ESA Letters: What Counts as Real Paperwork, and How to Get a Letter That Holds Up

What Is an ESA Letter?

An ESA letter is a signed statement from a licensed mental health professional saying that you have a mental or emotional condition and that an emotional support animal helps with it. That letter is what turns your pet into an assistance animal in the eyes of housing law.

Its legal weight comes from the Fair Housing Act, which requires housing providers to make reasonable accommodations for people with disabilities (42 U.S.C. § 3604(f)(3)(B)). HUD published detailed guidance in 2020 on what documentation a landlord may ask for and what counts as reliable (FHEO-2020-01); that guidance was rescinded in 2025, but the letter it described is the same documentation courts recognized for decades before it and that state statutes require today (see the 2026 change). Nothing you can buy from a registry site plays that role; we cover that in detail in our page on the ESA registration myth.

What Makes an ESA Letter Valid?

Landlords and property managers verify letters. A letter that holds up contains four things:

• The professional's letterheadThe letter is issued on the professional's or practice's letterhead with contact information a landlord can use to verify it. Courts and state agencies look for documentation a housing provider can reasonably rely on, the standard HUD's 2020 guidance also articulated before its rescission.
• License type, number, and stateThe letter states the professional's license and the state that issued it, so the license can be checked against the state registry. California goes further and requires the license details in the letter by statute (Cal. Health & Safety Code § 122318).
• Your name and the disability-related needThe letter identifies you and states that you have a mental or emotional condition and that the animal provides disability-related support. It does not need to name your diagnosis, and under the Fair Housing Act as courts have long applied it, a landlord may not demand one.
• Date and signatureThe letter is signed and dated. Most landlords expect a letter under a year old, even though federal law sets no expiration.

How Do I Get an ESA Letter?

The legitimate process is the same everywhere: a licensed professional evaluates you, and if you qualify, writes the letter. Anyone who skips the evaluation is selling a template.

1. Answer Screening QuestionsComplete a short, confidential questionnaire about your mental and emotional health and your living situation. This determines whether an evaluation makes sense before you pay anything.
2. Complete an Evaluation with a Licensed ProfessionalA licensed mental health professional reviews your case and evaluates whether an emotional support animal serves a disability-related need. No in-person visit is required in most states; some states, like California, set a minimum provider relationship period.
3. Receive Your Signed LetterIf the professional determines you qualify, you receive a signed letter on their letterhead with their license details, usually within 48 hours. You give a copy to your landlord with your accommodation request.

See if you qualify before you spend anything

The screening takes about five minutes. If a licensed professional determines you do not qualify, you get a full refund under our money-back guarantee.

Take the Free Screening

No payment required for the screening. A licensed professional makes the qualification decision. Letters start at $59, with a money-back guarantee if you are not approved.

What a Real ESA Letter Looks Like

Here is the anatomy of a letter that passes a landlord's verification. Hover over each part.

A landlord may verify that the letter is genuine and the license is active. A landlord may not demand your medical records, your or your diagnosis (the standard HUD's 2020 guidance, since rescinded, articulated at 13, and one courts applied long before it; see the 2026 change).

How Long Does an ESA Letter Last?

Federal law sets no expiration date for ESA letters. What landlords look for is documentation of a current disability-related need, and in practice most treat a letter older than 12 months as stale, so renew annually and before any move. Some states layer their own timing rules on the provider relationship; California's are the strictest (see the California page).

Who Can Write an ESA Letter?

Any professional who is licensed to assess mental health and is acting within the scope of that license can write one. That includes:

• Licensed professional counselors (LPC, LPCC)
• Licensed marriage and family therapists (LMFT)
• Licensed clinical social workers (LCSW)
• Psychologists and psychiatrists
• Psychiatric nurse practitioners and physicians

The professional must be appropriately licensed for you. Several states add specific requirements: California requires the license details in the letter and a 30-day provider relationship before it can be issued (Cal. Health & Safety Code § 122318). Our state law hub tracks these rules with statute citations.

What Can a Landlord Ask For?

When your disability or the need for the animal is not obvious, a landlord may ask for reliable documentation of the disability-related need. That is what the letter is. The landlord may not:

• Ask for your diagnosis, medical records, or details of your condition under the Fair Housing Act
• Charge pet rent, pet fees, or pet deposits for an assistance animal in the many states that ban those charges by statute (see your state's page); under federal law this point is now contested after the rescission of HUD's 2020 guidance (see the 2026 change)
• Treat a pet breed or weight rule as an automatic bar; the question is the individual animal's actual conduct (our breed restrictions page covers this)

The full picture, including the narrow cases where a landlord can lawfully say no, is on our housing rights page.

Common Questions