ESA letters: the clinician's guide

In this article▾

1. What this guide covers
2. What is an ESA letter?
3. What is the difference between an ESA, a service animal, and a pet?
4. When should a clinician consider writing an ESA letter?
5. What clinical information should you assess before writing an ESA letter?
6. What should an ESA letter include?
7. What should you leave out of an ESA letter?
8. What does HUD say about assistance animals in housing?
9. Are ESA letters covered by the ADA?
10. Do ESA letters still work for air travel?
11. What should clinicians know about state-specific ESA rules?
12. Can a clinician write an ESA letter after one telehealth appointment?
13. Should you write an ESA letter for your own therapy patient?
14. How should you handle a patient who asks you to "just sign the form"?
15. What are the most common ESA letter mistakes?
16. What should your ESA assessment note contain?
17. A practical ESA letter template for clinicians
18. What should you document if you decline the ESA letter?
19. How should you handle an urgent housing deadline?
20. How should clinicians think about confidentiality and HIPAA?
21. What should you do before signing an ESA letter?
22. ESA letters: what should clinicians remember?
23. How can AI help clinicians write ESA letters?
24. ESA letter pitfalls to avoid
25. Frequently asked questions about ESA letters
26. What this post does NOT cover
27. References and sources

An ESA letter can look like a simple one-page request. For a clinician, it is not simply a form to complete.

When you write an emotional support animal letter, you are documenting a clinical opinion that connects a patient's mental or emotional health condition to a disability-related need for an assistance animal. The letter may then be used in a housing accommodation request, where the distinction between a pet, an emotional support animal, and a service animal matters.

That creates a practical responsibility: your letter should say enough to support the patient's legitimate need without disclosing unnecessary clinical information or making claims outside your role.

This guide explains how to approach ESA letters from the clinician's side, including what to assess, what to document, what the letter should contain, when you should decline or refer the request, and how federal and state rules can affect the process.

What this guide covers

• How ESA letters differ from service-animal and pet documentation, and what changed at HUD in 2025 and 2026
• What to assess before you write, and what belongs in the letter
• How to handle confidentiality, ethics, state rules, and pressure to "just sign"
• How AI can draft the paperwork while the clinical call stays with you

What is an ESA letter?

An ESA letter is a letter from an appropriately qualified healthcare or mental health professional documenting a person's disability-related need for an emotional support or assistance animal.

The important clinical question is not simply whether a patient feels better around an animal. The question is whether the patient's condition creates a disability-related need for the animal as an accommodation.

The Fair Housing Act requires housing providers to make reasonable accommodations for people with disabilities. An accommodation qualifies when it is necessary to give the person an equal opportunity to use and enjoy their home. Waiving a no-pets rule can be one of those accommodations. Whether that still covers an untrained emotional support animal is now contested at the federal level, as the HUD section below explains.

That means an ESA letter is most useful when it documents the clinical basis for the accommodation rather than simply declaring that a patient's pet is an ESA.

For clinicians, the distinction is important.

You are not being asked to certify that an animal is universally therapeutic. You are documenting your clinical understanding of a particular patient's condition and the relationship between that condition and the requested accommodation.

Clinical takeaway: An ESA letter should connect three things clearly: the patient's clinical condition, the relevant disability-related limitation, and the need for the requested animal accommodation.

What is the difference between an ESA, a service animal, and a pet?

An emotional support animal provides emotional support or other assistance related to a person's disability, while a service animal is generally individually trained to perform specific work or tasks for a person with a disability.

A pet does not receive a special legal status simply because its owner finds the animal comforting.

These categories are often confused because the same dog could be a pet for one person, an emotional support animal for another, or a trained psychiatric service dog for another.

Sources: DOJ: Frequently asked questions about service animals and the ADA · HUD enforcement guidance on animal accommodations (May 2026)

The ADA definition of a service animal is narrower than the Fair Housing Act's treatment of assistance animals. Under the ADA, emotional support animals whose sole function is providing comfort are not service animals. Psychiatric service dogs can qualify when they are individually trained to perform work or tasks related to a person's disability.

That distinction matters because an ESA letter does not automatically give a patient the right to take an emotional support animal into every public place.

What an ESA letter does not do

An ESA letter does not:

• Turn an ordinary pet into an ADA service animal
• Guarantee acceptance by every landlord or housing provider
• Guarantee airline access
• Establish that an animal is trained to perform disability-related tasks
• Replace a housing provider's reasonable-accommodation process
• Override state or local requirements
• Certify that an animal is safe, trained, or suitable for every environment

If a patient asks for an ESA letter because they want to take their dog into restaurants, stores, workplaces, or other public settings, clarify the distinction before proceeding.

When should a clinician consider writing an ESA letter?

A clinician should consider writing an ESA letter when the request falls within their professional competence, the clinician has enough information to form a reasonable clinical opinion, and the documentation accurately reflects the patient's disability-related need.

The decision should come from clinical judgment rather than from the patient's urgency, housing deadline, or preferred wording.

A useful starting point is to ask four questions:

• Do I have an established clinical relationship with this patient?
• Do I have enough information to understand the relevant condition and functional impact?
• Can I clinically support the relationship between the condition and the need for the animal?
• Am I permitted and professionally qualified to provide this type of documentation in the relevant jurisdiction and context?

If the answer to any of these questions is no, pause before writing.

What if the patient has a diagnosis but has never discussed the animal?

A diagnosis by itself does not answer the accommodation question.

A patient can have depression, anxiety, PTSD, or another mental health condition and still require a separate clinical assessment of whether an animal is relevant to their disability-related functioning.

Ask how the animal affects the patient's symptoms and functioning.

Useful questions include:

• What changes when the animal is present?
• What symptoms does the patient experience without the animal?
• How does the animal affect those symptoms?
• Does caring for the animal support routines, activity, social engagement, sleep, or another clinically relevant function?
• Is the benefit specific enough to distinguish the animal's role from ordinary companionship?
• What does the patient expect the animal accommodation to change?

The answers should inform your clinical judgment. They should not be treated as a script that automatically produces an ESA recommendation.

What clinical information should you assess before writing an ESA letter?

The assessment should establish enough clinical context to support your professional opinion without turning the letter into a complete treatment summary.

A practical ESA assessment can cover five areas.

1. The patient's clinical condition

Document the condition that forms the basis for your clinical opinion.

Depending on your role and the purpose of the letter, this may include:

• Diagnosis or clinically relevant condition
• Current symptoms
• Duration and course
• Functional impact
• Relevant treatment history
• Current treatment relationship

Use the level of diagnostic specificity that is clinically appropriate and necessary.

2. Functional impact

The accommodation question is about disability-related functioning, not simply whether the patient likes animals.

Explore how the condition affects meaningful areas of life.

For example:

• Leaving the home
• Maintaining daily routines
• Sleeping
• Managing anxiety symptoms
• Regulating distress
• Social functioning
• Concentration
• Activities of daily living
• Maintaining treatment-related routines

Do not assume that every patient with the same diagnosis will have the same functional limitations.

3. The animal's role

Ask what the animal actually does for the patient.

The answer may be surprisingly specific.

A patient might report that caring for the animal gives them a predictable morning routine. Another might describe reduced distress when the animal is present during periods of severe anxiety. Another might say the animal motivates them to leave the home and maintain daily activity.

Those details are more clinically useful than simply writing that the animal provides "comfort."

4. The relationship between the animal and the condition

The core question is whether there is a clinically supportable relationship between the animal and the disability-related need.

You should be able to explain the relationship in plain language.

For example:

The patient's symptoms interfere with maintaining daily routines, and caring for the animal provides a consistent structure that supports those routines.

Or:

The patient's symptoms include significant distress that is reduced in the presence of the animal, based on the patient's reported experience and clinical observations.

Your actual statement should reflect your own assessment. Do not copy generic language into a patient's record simply because it appears in another letter.

5. The requested accommodation

Finally, determine what the patient is actually requesting.

For housing, the request may involve an exception to a no-pet policy or another animal-related housing restriction.

Ask the patient what documentation the housing provider has requested.

That matters because an ESA letter written for a housing accommodation should not accidentally be framed as an airline certificate or ADA service-animal certification.

What should an ESA letter include?

An ESA letter should contain enough information to establish the clinician's professional relationship, qualifications, clinical basis, and disability-related need without unnecessarily disclosing protected health information.

A practical structure is:

Sources: California Health and Safety Code § 122318 (license details in the letter) · American Psychiatric Association: Resource document on ESAs (2022)

The exact requirements can vary by jurisdiction, housing provider, and circumstance.

Do you need to name the diagnosis?

Not necessarily in every situation.

The more important question is what information is necessary to support the accommodation request.

Housing providers often ask for reliable information when a disability or disability-related need is not obvious, and some state laws spell out what they may request. That does not mean a clinician should automatically disclose a patient's complete diagnosis, treatment history, psychotherapy notes, or unrelated symptoms.

Think in terms of purpose.

If the housing provider needs documentation establishing a disability-related need for an assistance animal, a full clinical history is usually unnecessary for that purpose.

How much clinical detail is enough?

Enough to support your opinion, but not so much that the letter becomes a treatment record.

A useful rule is:

Document the clinical reasoning, not the entire clinical history.

For example, a concise statement connecting symptoms, functional impact, and the animal's role can be more appropriate than several paragraphs describing trauma history, medication changes, family relationships, and unrelated diagnoses.

What should you leave out of an ESA letter?

An ESA letter should not become a dumping ground for every piece of information in the patient's chart.

Avoid including information that does not support the specific purpose of the letter.

That commonly includes:

• Detailed psychotherapy content
• Unrelated diagnoses
• Medication lists when they are not relevant
• Trauma narratives
• Family history
• Detailed treatment notes
• Information about other patients
• Speculation about the animal's behavior
• Claims about animal training that you cannot verify
• Legal conclusions outside your expertise

Be particularly careful with absolute statements.

Avoid writing that an animal is "medically necessary in all circumstances" unless you have a specific clinical basis for such a statement and understand the implications.

Likewise, do not state that the patient is "legally entitled" to a particular accommodation unless you are qualified to make that legal determination and have verified the applicable law.

A clinician's role is to provide clinical documentation.

What does HUD say about assistance animals in housing?

The Fair Housing Act requires reasonable accommodations when necessary to give a person with a disability an equal opportunity to use and enjoy a dwelling.

Federal housing regulations prohibit refusing reasonable accommodations in rules, policies, practices, or services when the accommodation may be necessary to provide equal opportunity to use and enjoy a dwelling.

HUD's own position has changed. On September 17, 2025, HUD rescinded its 2013 and 2020 assistance-animal notices, the guidance most ESA letter advice was built on.

In a May 22, 2026 enforcement memo, HUD went further. It will find reasonable cause only when the animal is individually trained to perform disability-related work or tasks. Requests to waive pet policies for untrained emotional support animals are no longer presumptively reasonable.

That is an enforcement choice, not a new statute. Tenants can still file private Fair Housing Act lawsuits, state ESA laws still apply, and HUD says it plans formal rulemaking.

For you, the practical effect is more scrutiny. A housing provider now faces less federal pressure to approve an untrained ESA, so the clinical reasoning in your letter has to hold up on its own.

Sources: HUD, Enforcement Guidance on animal-related reasonable accommodations (May 22, 2026) · LeadingAge: HUD narrows Fair Housing Act interpretation of assistance animals · 42 U.S.C. § 3604 · 24 C.F.R. § 100.204

The housing context is still different from the ADA's public-access rules. The Fair Housing Act can cover species other than dogs, and some state laws, like Florida's, expressly address emotional support animals in housing.

For clinicians, the practical point is simple: do not describe an ESA letter as a universal animal-access certificate.

The letter may support a housing accommodation request. The legal rights attached to that request depend on the applicable law and circumstances.

What information can a housing provider request?

With HUD's notices rescinded, state statutes now give the most specific answers.

Florida's statute is a useful example. When a disability is not readily apparent, a housing provider may ask for information from a licensed practitioner with personal knowledge of the person's disability. An online registration, ID card, or certificate is not enough by itself.

That is one reason a clinician's letter can matter.

However, the letter should provide information relevant to the accommodation rather than unnecessary clinical details.

This is also where documentation quality matters.

A vague statement such as:

"My patient needs this dog for emotional support."

does not explain the clinical basis.

A stronger clinical statement establishes the relevant condition and explains the disability-related relationship between the patient and the requested animal.

Are ESA letters covered by the ADA?

An ESA letter does not make an emotional support animal a service animal under the ADA.

The ADA generally recognizes a service animal as a dog that has been individually trained to do work or perform tasks for a person with a disability. An animal whose sole function is emotional support does not meet that federal ADA definition.

A psychiatric service dog can qualify under the ADA when it is individually trained to perform specific work or tasks related to a person's disability.

That distinction is important when patients ask questions such as:

"Can I take my ESA everywhere?"

The answer is not simply yes or no. It depends on the setting and the applicable law.

Your ESA letter should not promise public access rights that the letter cannot establish.

Do ESA letters still work for air travel?

Clinicians should be especially careful with airline-related ESA requests.

The U.S. Department of Transportation's current rules distinguish emotional support animals from service animals for air travel. Under the DOT framework, airlines are required to recognize service dogs meeting the applicable definition, while emotional support animals are not treated as service animals under the Air Carrier Access Act. In practice, airlines may treat an emotional support animal as a pet.

Sources: DOT final rule: Traveling by Air With Service Animals (2020) · DOT Aviation Consumer Protection: Service animals

That means an ESA letter should not be presented to a patient as a guarantee of airline accommodation.

If a patient specifically asks for an ESA letter to fly with an animal, explain that airline rules are separate from housing accommodation rules and should be checked against the current requirements of the airline and DOT.

This distinction prevents a common problem: writing a clinically accurate letter for one purpose and having the patient rely on it for a completely different legal framework.

What should clinicians know about state-specific ESA rules?

Federal housing law is not the entire picture.

States can impose additional requirements on professionals who provide documentation, and those requirements can change.

California is a clear example. Before you document a need for an emotional support dog there, you must hold an active license and list its number, effective date, jurisdiction, and type in the letter. You also need a client-provider relationship of at least 30 days and a completed clinical evaluation. And you must warn the client, verbally or in writing, that falsely claiming a service dog is a misdemeanor. (California exempts verified homeless individuals from the 30-day rule.)

Florida takes a different angle. It accepts documentation from out-of-state practitioners only if they have provided in-person care to the tenant at least once.

Sources: California Health and Safety Code § 122318 · Florida Statutes § 760.27

That means you should not rely on a national ESA-letter template as if it establishes the requirements in every state.

Before signing a letter, verify:

• Your state's professional requirements
• Your licensing board's current rules
• Any state-specific ESA legislation
• The purpose of the accommodation
• Whether the recipient has specific documentation requirements
• Whether you have the required treatment relationship
• Whether telehealth rules affect the evaluation
• Whether your professional liability carrier has guidance

The safest workflow is to verify the jurisdiction before you finalize the letter, not after the patient receives a rejection.

Can a clinician write an ESA letter after one telehealth appointment?

There is no single federal answer that makes one appointment appropriate in every case.

The more important clinical question is whether you have sufficient information and an appropriate professional relationship to support the opinion you are documenting.

State law and professional standards may impose additional requirements.

Some states already do. In California, one visit is not enough for an emotional support dog letter. The law requires a 30-day client-provider relationship first, except for clients verified to be homeless. Florida, by contrast, names telehealth providers as an acceptable source of documentation.

If you have just met a patient and the primary purpose of the encounter is obtaining an ESA letter, consider whether you genuinely have enough information to make a defensible clinical determination.

That may mean declining the request, continuing assessment, or referring the patient to a clinician who can appropriately evaluate the request.

A short appointment does not automatically make a letter invalid. But a short appointment also does not automatically give you enough clinical evidence to support one.

Should you write an ESA letter for your own therapy patient?

This is one area where clinicians should not rely on a single universal rule.

Professional guidance has raised ethical concerns about the potential conflict between treating a patient and serving as an evaluator for a third-party accommodation request.

Sources: Younggren, Boisvert, and Boness (2016) · Boness, Younggren, and Frumkin (2017) · Carroll et al. (2020) · American Psychiatric Association resource document (2022) · APA Monitor on Psychology (2016)

The concern is practical.

Your therapeutic relationship is built around treatment. An ESA letter can introduce a second role in which you are making a formal statement intended for someone outside the treatment relationship.

That can become especially complicated if:

• You determine that the patient does not meet the relevant criteria
• The housing provider rejects the letter
• The patient asks you to exaggerate their symptoms
• The patient asks you to change wording you do not support
• The third party challenges your documentation
• Your clinical opinion conflicts with the patient's desired outcome

Professional guidance is not uniform across every discipline or jurisdiction, so clinicians should review their own licensing requirements, professional ethics standards, malpractice guidance, and practice policies.

If your practice does not provide third-party evaluations, make that boundary clear before treatment begins.

How should you handle a patient who asks you to "just sign the form"?

Treat the request as a clinical documentation request, not an administrative signature.

Start by asking what the form is for and what the patient is requesting.

Then assess the clinical basis independently.

A useful response might be:

"I can review the request with you, but I need to determine whether I can clinically support the accommodation before I complete any documentation."

That establishes an important boundary.

You are not promising the letter.

You are agreeing to evaluate the request.

What if the patient brings a prewritten ESA letter?

Do not sign it automatically.

Review every statement.

Ask:

• Is this accurate?
• Is this based on my clinical knowledge?
• Does it accurately describe my role?
• Does it contain claims I cannot verify?
• Does it imply legal rights I cannot establish?
• Does it disclose more information than necessary?
• Would I be comfortable defending the statement if another professional reviewed it?

If the answer to any of those questions is no, rewrite it or decline to sign it.

What are the most common ESA letter mistakes?

The most common problems are usually not grammatical. They are problems of clinical reasoning, scope, documentation, or legal overstatement.

1. Writing the letter before assessing the need

A patient asks for a letter, and the clinician immediately opens a template.

Why it fails: The document becomes the starting point instead of the clinical assessment.

Better approach: Assess the patient's condition, functional impact, animal-related benefit, and requested accommodation first.

2. Treating diagnosis as automatic eligibility

A patient has anxiety, therefore the patient needs an ESA.

Why it fails: A diagnosis alone does not establish the specific disability-related need for an animal.

Better approach: Document the functional relationship between the condition and requested accommodation.

3. Using generic language

"Patient requires this animal for emotional support."

Why it fails: It provides little clinical reasoning.

Better approach: Explain the relevant relationship between the patient's condition and the animal's role.

4. Over-disclosing

The letter contains several paragraphs about the patient's history.

Why it fails: The additional information may not be necessary for the accommodation request.

Better approach: Apply a minimum-necessary mindset and disclose only what is appropriate for the purpose.

5. Promising rights the letter cannot provide

"This letter allows your dog to accompany you anywhere."

Why it fails: ESA status does not create universal public-access rights.

Better approach: Keep the letter focused on the clinical opinion and specific accommodation.

6. Certifying animal training without evidence

"The animal is trained to perform therapeutic tasks."

Why it fails: A clinician may have no basis to certify animal training.

Better approach: Document only what falls within your knowledge and professional role.

7. Copying an internet template without checking the jurisdiction

Why it fails: Federal, state, professional, and setting-specific requirements can differ.

Better approach: Verify current requirements before signing.

8. Allowing the patient to dictate the clinical conclusion

Why it fails: The clinician becomes a document signer rather than an independent professional.

Better approach: Let clinical evidence determine the conclusion.

What should your ESA assessment note contain?

Your clinical record should provide enough information to show how you reached your conclusion.

The exact documentation requirements depend on your discipline, setting, jurisdiction, and clinical record standards, but a practical note can address:

Presenting request: What the patient is asking for and why.

Relevant condition: The condition or symptoms relevant to the request.

Functional impact: How those symptoms affect the patient's functioning.

Animal relationship: What the patient reports about the animal's effect on symptoms or functioning.

Clinical assessment: Your observations and professional judgment.

Decision: Whether you support the requested documentation and why.

Patient education: What you explained about the scope and limitations of an ESA letter.

Follow-up: Any additional information, referral, or reassessment needed.

This documentation is useful even when you decide not to write the letter.

A declined request should not look like an unexplained administrative refusal.

A practical ESA letter template for clinicians

The following is a starting structure, not a universal legal form. Adapt it to your profession, jurisdiction, clinical relationship, and the specific purpose of the documentation.

ESA letter example

[Practice Letterhead]

Date: [Date]

Re: [Patient Name]

To Whom It May Concern:

I am [Clinician Name], [Credentials], licensed to practice in [State] under license number [License Number]. I am currently providing behavioral health services to [Patient Name].

Based on my professional relationship with and clinical evaluation of this patient, I understand that [Patient Name] has a mental or emotional health condition that substantially affects one or more areas of functioning.

Based on my clinical assessment, it is my professional opinion that the presence of an emotional support animal is related to the patient's disability-related needs. The animal provides support that is relevant to the patient's symptoms and functioning, specifically [brief, clinically appropriate explanation].

I am recommending that [Patient Name] be permitted to keep the animal as a reasonable accommodation in housing, subject to applicable law and the housing provider's accommodation process.

This letter documents my clinical opinion regarding the patient's disability-related need for the requested accommodation. It does not certify the animal as a service animal, certify animal training, or establish rights outside the applicable accommodation framework.

Please contact my office at [contact information] if additional information is needed and may appropriately be disclosed.

Sincerely,

[Clinician Name, Credentials][License][Practice Name][Contact Information]

Why this structure works

The template separates clinical documentation from legal conclusions.

It identifies the clinician.

It establishes the treatment relationship.

It explains the clinical basis.

It connects the animal to the patient's disability-related need.

It identifies the accommodation.

And it avoids certifying things the clinician may not actually know, such as the animal's training or behavior.

Do not use the sample language word-for-word without assessing whether each statement is accurate for the patient.

What should you document if you decline the ESA letter?

A declined request should still be handled clinically and respectfully.

Your documentation can state:

• What the patient requested
• What information you considered
• Why you could not support the request
• Whether more assessment is needed
• Whether you offered a referral
• What you explained to the patient

Possible reasons for declining may include insufficient clinical information, lack of an appropriate professional relationship, scope-of-practice limitations, a conflict created by your role, jurisdiction-specific requirements, or an inability to independently support the requested conclusion.

Avoid judgmental language.

"Patient is trying to get around the landlord's pet policy" is different from documenting:

"Patient requested documentation for a housing accommodation. Available clinical information was insufficient for me to independently establish a disability-related need for the requested animal. Discussed referral options."

The second statement describes the clinical and documentation issue without assigning motive.

How should you handle an urgent housing deadline?

Urgency should change your workflow, not your clinical standard.

Patients may arrive with a notice from a landlord saying that documentation is needed within 24 or 48 hours.

That can create pressure to sign quickly.

Do not allow the deadline to determine your clinical conclusion.

Instead:

• Clarify the exact accommodation being requested.
• Obtain the relevant housing documentation if appropriate.
• Review the patient's clinical record.
• Assess whether you have enough information.
• Verify applicable state and professional requirements.
• Document your clinical reasoning.
• Write the letter only if you can support it.
• Explain any limitations or missing information.

If you cannot complete a defensible assessment in the available timeframe, say so.

A rushed letter can create a bigger problem than a delayed one.

How should clinicians think about confidentiality and HIPAA?

An ESA letter often goes to someone outside the patient's treatment team.

That makes information disclosure an important consideration.

Two HIPAA paths usually apply. If you give the letter to the patient, HIPAA treats that as a disclosure to the individual. If you send it straight to the housing provider, you need the patient's written authorization (a release of information form), and that authorization defines what you may share.

HIPAA's minimum necessary standard does not technically apply to either path. It is still the right habit, and the APA Ethics Code (Standard 4.04) asks psychologists to include only information germane to the purpose of a report.

The practical question is therefore not simply:

"Can I send this?"

It is:

"What information is appropriate to disclose for this purpose, to this recipient, and under what authorization or other HIPAA provision?"

For a housing accommodation, that usually argues for a focused letter rather than a copy of the patient's entire clinical record.

Do not attach psychotherapy notes or unrelated records simply because a housing provider asks for "supporting documentation."

If the request is broader than you believe is appropriate, review the request against HIPAA, applicable state privacy law, your organization's policies, and professional guidance.

What should you do before signing an ESA letter?

Use this pre-signature checklist.

Clinical assessment

• Condition: Have I established the relevant clinical condition or symptoms?
• Function: Have I assessed the functional impact?
• Animal relationship: Do I understand how the animal relates to the patient's symptoms or functioning?
• Clinical basis: Can I independently support the conclusion?

Scope

• Purpose: Do I know what the letter will be used for?
• Setting: Is this housing, travel, school, work, or another context?
• Role: Am I acting within my professional competence?
• Relationship: Do I have an appropriate clinical relationship with the patient?

Documentation

• Accuracy: Is every statement factually accurate?
• Specificity: Does the letter explain the disability-related need?
• Confidentiality: Have I limited disclosure to information appropriate for the purpose?
• Credentials: Are my license and professional details correct?
• Date: Is the letter dated?

Legal and jurisdictional checks

• State rules: Have I checked current requirements in my jurisdiction?
• Accommodation: Have I avoided promising rights beyond the applicable framework?
• Animal status: Have I avoided calling an ESA a service animal?
• Training: Have I avoided certifying animal training I cannot verify?

If any answer is no, stop before signing.

ESA letters: what should clinicians remember?

An ESA letter is clinical documentation with a specific purpose, not a universal certification for an animal.

The strongest letters are built from a defensible clinical assessment. They establish the relevant condition, explain the disability-related impact, connect that impact to the animal's role, and identify the accommodation being recommended.

The biggest mistake is treating the letter as the assessment.

The assessment comes first.

Your documentation should support your professional opinion without disclosing unnecessary clinical information. Your letter should stay within your scope. And your legal language should be limited to what you can responsibly establish.

Federal housing rules, ADA service-animal rules, airline rules, and state requirements are not interchangeable. A patient may use the same animal in different settings, but the legal framework governing each setting can be different.

When in doubt, slow down.

Verify the purpose. Check the jurisdiction. Review your clinical record. Document your reasoning. Then write only what you can support.

How can AI help clinicians write ESA letters?

AI can reduce the administrative work around ESA documentation, but it should not make the clinical decision for you.

For an ESA letter, the useful role for AI is organization.

You can use AI to turn structured clinical information into a draft that follows your practice's preferred format, identify missing sections, make language more concise, or check whether the letter clearly distinguishes clinical observations from legal conclusions.

For example, a structured workflow might capture:

• Patient's relevant condition
• Functional limitations
• Animal-related benefit
• Requested accommodation
• Clinician's clinical conclusion
• Recipient
• Required clinician credentials
• State-specific documentation requirements

An AI documentation tool can then organize those inputs into a draft.

What AI handles well

AI is useful for:

• Structuring a letter from clinician-provided information
• Removing repetitive language
• Improving readability
• Creating consistent formatting
• Identifying missing administrative fields
• Converting structured notes into a practice-approved template
• Flagging potentially overbroad statements for clinician review

The benefit is particularly practical when you write several types of clinical documentation and do not want to recreate the same structure manually.

Where the clinician still needs to review

You should personally verify:

• The patient's identity
• Diagnosis or clinical condition
• Functional limitations
• The relationship between the condition and animal
• Your professional relationship with the patient
• Your clinical conclusion
• State-specific requirements
• The intended recipient
• The requested accommodation
• Every factual statement in the final letter

AI should not decide whether a patient qualifies for an ESA.

It should not invent clinical observations.

It should not infer a diagnosis from incomplete information.

It should not determine that a particular accommodation is legally required.

And it should not insert a legal claim simply because similar language appears in another template.

How Supanote can help

Supanote works at the note level, which is where an ESA decision should live. You can record, dictate, or upload the assessment conversation, and Supanote turns it into a structured note in a format you define. Condition, functional impact, and the animal's role land in the same place every time.

The useful workflow is to capture the relevant clinical information during your normal documentation process, then use that information as the source for a clinician-reviewed ESA letter draft. You adjust tone or detail in plain English, nothing is final until you sign off, and recordings are deleted after transcription.

That keeps the important distinction intact: AI can handle the drafting work, but you remain responsible for the clinical judgment.

A documentation tool also cannot solve a missing clinical assessment. If the underlying record does not establish the patient's disability-related need, better wording will not fix the problem.

Supanote is Supa's clinical documentation product, part of the same platform Supa builds for outpatient mental health practices.

ESA letter pitfalls to avoid

• Do not issue a letter solely because a patient asks for one.
• Do not equate a mental health diagnosis with automatic ESA eligibility.
• Do not use an online template without reviewing every statement.
• Do not promise that an ESA can accompany the patient everywhere.
• Do not describe an ESA as an ADA service animal.
• Do not certify animal training unless you have a legitimate basis to do so.
• Do not disclose a patient's entire clinical history when a focused letter is sufficient.
• Do not let a housing deadline replace clinical judgment.
• Do not ignore state-specific requirements.
• Do not allow AI to make the clinical determination.
• Do not sign language that you cannot independently defend.

Frequently asked questions about ESA letters

What is an ESA letter?

An ESA letter is professional documentation supporting a person's disability-related need for an emotional support or assistance animal. In the housing context, it may support a request for a reasonable accommodation under applicable fair-housing rules.

Can any therapist write an ESA letter?

Not necessarily. Whether a clinician can provide the documentation depends on professional qualifications, jurisdiction-specific requirements, the clinician's relationship with the patient, and the purpose of the letter.

Does a therapist need to diagnose the patient before writing an ESA letter?

The clinician needs enough clinical information to support the professional opinion being documented. A diagnosis alone does not establish a disability-related need for an animal, and the exact documentation requirements vary by circumstance and jurisdiction.

Does an ESA letter make a dog a service animal?

No. Emotional support animals and service animals are distinct categories under federal law. An ESA letter does not establish that an animal is individually trained to perform tasks as required for service-animal status under the ADA.

Can an ESA go into restaurants and stores?

An ESA letter does not create general public-access rights under the ADA. Whether an animal can enter a particular setting depends on the applicable law and the animal's legal status.

Can an ESA letter be used for housing?

ESA-related documentation is commonly associated with housing accommodation requests. The applicable federal framework is different from the ADA's public-access rules, and the housing provider's accommodation process and applicable law still matter. Since May 2026, HUD pursues Fair Housing Act complaints only when the animal is trained, though private lawsuits and state laws still apply.

Can an ESA letter be used for air travel?

Do not assume that a housing-oriented ESA letter establishes airline access. Current DOT rules distinguish emotional support animals from service animals for air travel.

Should the diagnosis be included in an ESA letter?

Not automatically. The letter should contain enough clinically appropriate information to support the accommodation request while avoiding unnecessary disclosure of protected health information.

Can a clinician write an ESA letter after one appointment?

There is no universal federal rule that makes one appointment sufficient or insufficient in every case. The clinician needs enough information and an appropriate professional basis to support the opinion, while state and professional requirements may impose additional conditions.

Should clinicians write ESA letters for their own therapy patients?

This depends on professional standards, jurisdiction, practice policy, and the circumstances. Clinicians should consider the potential conflict between their treatment role and an evaluative or third-party documentation role.

What if a patient asks the clinician to sign a prewritten ESA letter?

Review every statement before signing. Do not certify claims about the patient's condition, the animal, or legal rights that you cannot independently support.

Can AI write an ESA letter?

AI can help organize clinician-provided information and create a draft, but the clinician should determine the clinical conclusion and verify every factual statement before signing.

Does HIPAA prevent a clinician from sending an ESA letter?

HIPAA does not create a blanket prohibition on providing documentation to third parties. However, clinicians should consider the applicable authorization and disclosure rules and limit information appropriately for the intended purpose.

What if the housing provider asks for the patient's complete medical record?

A request for broad clinical information should not automatically result in disclosure of the entire record. Review what information is actually appropriate for the purpose, along with HIPAA, state privacy law, organizational policy, and professional requirements.

What if I do not believe the patient needs an ESA?

Do not write a letter that states otherwise. Document your assessment, explain the decision to the patient, and provide appropriate next steps or referral information when clinically appropriate.

What this post does NOT cover

This guide focuses on the clinician's role in evaluating and documenting ESA requests.

It does not provide legal advice, determine whether a specific patient meets a legal definition of disability, or provide state-by-state legal requirements for every U.S. jurisdiction.

It also does not establish eligibility for public access, employment accommodations, educational accommodations, or airline travel.

Those questions should be evaluated under the laws and rules applicable to the specific setting.

References and sources

• American Psychiatric Association. (2022). Resource document on emotional support animals. https://www.psychiatry.org/getattachment/3d42da2a-9a4d-4479-869f-4dd1718f1815/Resource-Document-Emotional-Support-Animals.pdf
• American Psychological Association. (2017). Ethical principles of psychologists and code of conduct (2002, amended effective June 1, 2010, and January 1, 2017). https://www.apa.org/ethics/code
• Bilowich, J. (2026, June 9). HUD narrows Fair Housing Act interpretation of assistance animals. LeadingAge. https://leadingage.org/hud-narrows-fair-housing-act-interpretation-of-assistance-animals/
• Binder, R. L., Gandhi, T., Menon, M., Audu, A., Nesbit, A., Ridout, K. K., Campbell, J., Garayalde, S., & Dike, C. C. (2023). Considerations for the writing of certification letters endorsing use of emotional support animals. Psychiatric Services, 74(9), 963-969. https://doi.org/10.1176/appi.ps.20220487
• Boness, C. L., Younggren, J. N., & Frumkin, I. B. (2017). The certification of emotional support animals: Differences between clinical and forensic mental health practitioners. Professional Psychology: Research and Practice, 48(3), 216-223. https://doi.org/10.1037/pro0000147
• California Health and Safety Code § 122318. https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC&sectionNum=122318
• Carroll, J. D., Mohlenhoff, B. S., Kersten, C. M., McNiel, D. E., & Binder, R. L. (2020). Laws and ethics related to emotional support animals. Journal of the American Academy of Psychiatry and the Law, 48(4), 509-518. https://jaapl.org/content/48/4/509
• Clay, R. A. (2016, September). Is that a pet or therapeutic aid? Monitor on Psychology, 47(8), 38. https://www.apa.org/monitor/2016/09/pet-aid
• Florida Statutes § 760.27. https://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0700-0799/0760/Sections/0760.27.html
• Legal Information Institute. (n.d.). 24 CFR § 100.204: Reasonable accommodations. Cornell Law School. https://www.law.cornell.edu/cfr/text/24/100.204
• Legal Information Institute. (n.d.). 42 U.S. Code § 3604: Discrimination in the sale or rental of housing and other prohibited practices. Cornell Law School. https://www.law.cornell.edu/uscode/text/42/3604
• Legal Information Institute. (n.d.). 45 CFR § 164.508: Uses and disclosures for which an authorization is required. Cornell Law School. https://www.law.cornell.edu/cfr/text/45/164.508
• U.S. Department of Health and Human Services. (n.d.). Does HIPAA provide extra protections for mental health information compared with other health information? https://www.hhs.gov/hipaa/for-professionals/faq/does-hipaa-provide-extra-protections-mental-health-information-compared-other-health.html
• U.S. Department of Health and Human Services. (n.d.). Minimum necessary requirement. https://www.hhs.gov/hipaa/for-professionals/privacy/guidance/minimum-necessary-requirement/index.html
• U.S. Department of Housing and Urban Development, Office of Fair Housing and Equal Opportunity. (2026, May 22). Enforcement guidance: Assessing requests for the use of an animal as a reasonable accommodation under the Fair Housing Act [Memorandum]. https://www.hud.gov/sites/default/files/hudclips/documents/AS-Trainor-Enforcement-Guidance-Assessing-Requests-for-the-use-of-an-animal-as-a-reasonable-accommodation-under-the-fair-housing-act.pdf
• U.S. Department of Justice, Civil Rights Division. (n.d.). ADA requirements: Service animals. ADA.gov. https://www.ada.gov/resources/service-animals-2010-requirements/
• U.S. Department of Justice, Civil Rights Division. (n.d.). Frequently asked questions about service animals and the ADA. ADA.gov. https://www.ada.gov/resources/service-animals-faqs/
• U.S. Department of Transportation. (2020). Traveling by air with service animals [Final rule]. Federal Register, 85(238), 79742. https://www.govinfo.gov/content/pkg/FR-2020-12-10/html/2020-26679.htm
• U.S. Department of Transportation. (n.d.). Service animals. Aviation Consumer Protection. https://www.transportation.gov/resources/individuals/aviation-consumer-protection/service-animals
• Younggren, J. N., Boisvert, J. A., & Boness, C. L. (2016). Examining emotional support animals and role conflicts in professional psychology. Professional Psychology: Research and Practice, 47(4), 255-260. https://doi.org/10.1037/pro0000083

Clinical/legal note: Federal and state rules governing assistance animals, professional documentation, housing accommodations, privacy, and animal access can change. Clinicians should verify current requirements applicable to their jurisdiction and professional license before issuing documentation. Sources in this guide were checked in September 2026.