An emotional support animal letter does not have a federally mandated expiration date, but as a practical matter, most housing providers treat an ESA letter as current for about one year from the date it was issued. That one-year window is industry convention, not law. How long your letter actually lasts depends on what your housing provider will accept and whether your mental health professional’s assessment is still recent enough to be considered reliable.
Where the One-Year Standard Comes From
No federal statute or regulation sets a shelf life for ESA letters. The Fair Housing Act protects people with disabilities from housing discrimination and gives them the right to keep an assistance animal as a reasonable accommodation, even in no-pet buildings.1Office of the Law Revision Counsel. United States Code Title 42 Section 3604 HUD guidance says a housing provider may ask for reliable information confirming the disability and the need for the animal, but it does not prescribe a format for the letter and does not mention a renewal period.2U.S. Department of Housing and Urban Development. Fact Sheet on HUD Assistance Animals Notice
So why does everyone say one year? Part of it traces back to a former Department of Transportation rule that once required ESA documentation dated within the past year for air travel. That airline rule is gone, but the convention stuck. Landlords adopted it as their own internal policy, and mental health professionals write letters with a one-year horizon because a person’s condition can change and a fresh assessment protects both patient and provider.
No landlord can legally reject your ESA letter solely because it lacks a printed expiration date. But a letter that is several years old with no recent follow-up may reasonably prompt a housing provider to ask for updated documentation.
What Makes a Letter Still Count as Current
A housing provider looking at your letter is checking whether a licensed professional with personal knowledge of your condition still supports the accommodation. The date of issuance is the first thing they look at, but it is not the only thing.
A letter that holds up under scrutiny typically shows:
- The provider’s full name, license type, license number, and contact information.
- A clear date of issuance.
- A statement that you have a condition recognized by the DSM-5 and that the animal is part of your treatment, without disclosing your specific diagnosis.3Psychiatric News. What to Do If Patients Want Service or Emotional Support Animals
- A clear statement that the animal alleviates symptoms of your disability and is necessary for your mental health.
A note from a healthcare professional who has personal knowledge of your condition is what HUD considers reliable documentation.2U.S. Department of Housing and Urban Development. Fact Sheet on HUD Assistance Animals Notice A letter missing key elements, or one that reads like a form document with no personalized language, gives a housing provider stronger grounds to push back regardless of the date on it.
Renewing Your ESA Letter
Since most housing providers expect documentation from within the past year, plan to renew before your current letter’s anniversary. Contact the mental health professional who wrote the original letter and schedule a follow-up. The provider will assess whether your condition and your need for the animal remain the same, then issue a new letter with a current date.
If your original provider has retired or you have moved, you will need to establish care with someone new. That generally means at least one full evaluation, not a quick letter request. A legitimate provider will not issue a letter after a five-minute phone call, because the writer needs personal knowledge of your condition to make the letter reliable.
Expect to pay roughly $75 to $250 for the evaluation and letter, depending on the provider and where you live. Some insurance plans cover the underlying mental health visit even when they do not specifically cover “ESA letter” services. Start the renewal at least a month before your letter’s anniversary so you are not caught without current documentation during a lease renewal or a new apartment application.
Air Travel: Your Letter No Longer Helps
One boundary worth stating plainly because it catches people off guard. Before January 2021, airlines had to accommodate emotional support animals in the cabin at no charge under the Air Carrier Access Act. That changed when the Department of Transportation issued a final rule redefining “service animal” for air travel purposes to mean only a trained dog. Emotional support animals, comfort animals, and companionship animals are explicitly excluded.4U.S. Department of Transportation. U.S. Department of Transportation Announces Final Rule on Traveling by Air With Service Animals
Under the current rule, your ESA is treated as a pet when you fly, subject to each airline’s pet policies, cabin size limits, carrier requirements, breed restrictions, and pet fees.5U.S. Department of Transportation. Final Service Animal Rule A current ESA letter does not change this. It affects housing only.
Watch Out for Online Registries and Letter Mills
Websites offering instant ESA certifications, registration cards, or official-looking vests are not backed by any government body or medical organization. HUD’s guidance specifically warns that documentation from sites selling certificates to anyone who answers a few questions and pays a fee is generally not reliable enough to establish a disability or need for an assistance animal.2U.S. Department of Housing and Urban Development. Fact Sheet on HUD Assistance Animals Notice No official ESA registry or certification body exists, and no mainstream medical organization endorses the certificates or ID cards sold online.6American Family Physician. Emotional Support Animals Considerations for Documentation
A growing number of states have passed laws targeting these letter mills directly, typically requiring a real therapeutic relationship between provider and patient before an ESA letter can be issued, and in some cases imposing penalties for fraudulent documentation. HUD acknowledges that legitimate licensed professionals can deliver care remotely, including online. The issue is not telehealth. The issue is providers who issue letters without a genuine clinical assessment. A letter from that kind of source can be rejected by a landlord no matter how recently it was dated.
If a Landlord Rejects a Current Letter
If you have a legitimate, recent ESA letter from a licensed provider and your housing provider still refuses to accommodate your animal, put your request in writing if you have not already, and keep copies of everything. Sometimes a denial stems from a property manager who does not understand the law, and a written request citing the Fair Housing Act resolves it.
If that does not work, you can file a housing discrimination complaint with HUD’s Office of Fair Housing and Equal Opportunity at no cost. You must file within one year of the last date the discrimination occurred.7U.S. Department of Housing and Urban Development. Learn About FHEO’s Process to Report and Investigate Housing Discrimination You can also file with your state’s fair housing agency, and you have the option of a federal lawsuit under the Fair Housing Act. Damages in fair housing cases can include compensation for out-of-pocket expenses, emotional distress, and in some cases civil penalties against the housing provider.8U.S. Department of Housing and Urban Development. Assistance Animals