In short
Some do, and the ones who check look at the clinician, not at you: they search the licence in the state board's public database and contact the practice to confirm it issued the letter. Neither step touches your medical information, and Iowa Code § 216.8B(6)(a) and Florida § 760.27(3) bar requests for a diagnosis or medical records. Run both checks on your own letter first; a missing licence number is the most common defect.
Yes, some of them. And the ones who bother do far less than tenants imagine.
The picture most people carry into this is of a landlord investigating them: calling around, asking questions, building a case. The reality is duller and much narrower. A housing provider who checks an ESA letter is almost always answering two questions, both of which are about the clinician rather than about you.
Does this person hold the licence the letter claims? And did this person actually write it?
That is the whole exercise. Understanding that changes what you should worry about, because it means the risk in a genuine request is almost never the check. It is a document that cannot survive one.
How do landlords check an ESA letter, and how long does it take?
The licence lookup. Every state maintains a public licence verification database for its health professions: medicine, nursing, psychology, social work, counselling, marriage and family therapy. Anyone can search them. Nobody needs your permission, because a professional licence is a public record, not a piece of your medical information. A property manager types the name or the licence number and gets the licence type, the status, and usually the expiry date. It takes under two minutes.
This is why the licence number matters so much on the face of a letter, and why Iowa Code § 216.8C(1)(g) requires “the license number and type of license held by the licensee” in the written finding. Without those two items the lookup is a guess, and a guess is what makes a landlord hesitate.
The confirmation call. The second check is a phone call or an email to the practice on the letterhead, asking whether it issued the document. It is a yes-or-no. The clinician’s own confidentiality obligations stop the conversation there, and the law stops it independently: Iowa Code § 216.8B(6)(a) bars a landlord from requesting information that discloses a diagnosis, the severity of a disability, or any medical records, and Florida § 760.27(3) bars requesting information disclosing a diagnosis or severity or any medical records.
Which is worth sitting with for a second. A confirmation call is not an inquiry into your health. It cannot be, and a landlord who tries to turn it into one has stepped outside what the rules permit.
What can a landlord not do when checking an ESA letter?
The verification question tends to get asked as though a landlord holds all the cards. Several states have written down that it does not.
It may not demand a particular form. Florida § 760.27(3) bars a housing provider from requiring a specific form or a notarised statement, and bars denying a request solely because the tenant did not follow the provider’s routine method of making one. A landlord may prefer its own form; it may not make the request fail for arriving on different paper.
It may not ask at all where the need is obvious. Pennsylvania’s Assistance and Service Animal Integrity Act § 3(a) opens the door to a documentation request in one circumstance only, where neither the disability nor the disability-related need is readily apparent to the housing provider or otherwise known to it.
It may not treat silence as an answer. Iowa Code § 216.8B(2) requires the landlord to evaluate and respond within a reasonable amount of time, and § 216.8B(6)(e) requires a written determination. Where a state has no such provision, the federal position is that an unexplained delay functions as a refusal. The accommodation duty at 24 C.F.R. § 100.204(a) is not satisfied by a request that sits in a drawer.
It may not price the animal. Verification is a separate question from charges, and a landlord who accepts the letter and then adds pet rent has made a different mistake. One covered in ESA pet rent and deposits.
What makes a landlord look more closely at an ESA letter?
Property managers with a few hundred units see a lot of these letters, and the things that slow a request down are mostly mechanical rather than suspicious.
No licence number or licence type. The single most common defect, and the one that makes the whole file feel unverifiable. A letter that cannot be looked up gets set aside.
A registration number, certificate ID, or membership code anywhere on the page. The strongest negative signal a letter can carry. Registration confers no legal status in any state, and two legislatures said so on the record: Iowa at § 216.8B(4), which sweeps in cards, patches and certificates however obtained and rules that none of them establishes disability or need, and Florida at § 760.27(3), where an internet registration or certificate is not by itself proof. A clinical letter carrying a registry number tells a landlord the two documents came out of the same vendor.
A date that matches the application. A finding issued the same afternoon the tenant applied for the unit invites the question of what was assessed. It proves nothing on its own; plenty of real evaluations happen under deadline. It is still a question you would rather not be answering.
An out-of-state licence with nothing explaining it. This one has actual legal content in some states. Florida attaches a condition to the distant clinician at § 760.27(2)(b)4.: at least one occasion of in-person care or services to this tenant, personal knowledge of the disability, and work inside the scope of practice. Absent that occasion, the information does not count. Iowa takes the opposite approach and writes the out-of-state clinician into the same sentence that creates the requirement: § 216.8C(1) covers “a licensee of another state who is licensed under a similar law and who is in good standing with that state.” Same fact, two different consequences, which is why the state matters here more than almost anywhere else in this subject.
Language the manager has read before. Nothing makes a large operator more attentive than recognising a paragraph. Template phrasing is not unlawful and not evidence of anything, but it is the reason a file gets pulled.
So how do you prove you have an emotional support animal?
The adjacent question, and it has a slightly awkward answer: you do not prove anything about the animal. You supply information about yourself, and the animal follows.
Nothing certifies an animal as an emotional support animal. There is no test it passes, no training standard it meets, no credential it holds, and no body that confers the status. That is the difference between an ESA and a service dog under the ADA, where the animal is individually trained to perform a task, a distinction worked through in ESA versus service dog.
What exists is a finding about a person. A licensed clinician records that you have a disability and a disability-related need, and the animal’s status is a consequence of that finding rather than a property of the animal.
Which means the proof is three documents, not one:
The clinician’s letter. The finding itself, with the licence details that make it checkable.
Your written accommodation request. Dated, naming the policy you are asking to be excepted from, attaching the letter. This one is yours to write, can I write my own ESA letter explains why the request is yours and the finding is not.
The landlord’s written answer. Iowa Code § 216.8B(6)(e) requires a written determination, and where a state does not require one it is still worth asking for. If it never arrives, the absence is itself part of what you would complain about later.
There is a fourth item that is not proof of status but answers the question a landlord is actually asking. Iowa § 216.8B(6)(d) permits a landlord to require proof of compliance with state and local licensure and vaccination requirements for each assistance animal. Vaccination records and a city dog licence are legitimate to ask for, easy to supply, and reassuring in a way the legal argument never is. Volunteering them early moves the conversation along, our pet ID and records sheet keeps them in one place.
Why should you want your ESA letter to be verifiable?
Here is the inversion worth making, because it changes what you do next.
A tenant hoping nobody checks is a tenant who has quietly accepted that the document would not survive it. That is a bad position, and it stays bad for the whole tenancy: through a renewal, a change of management, a sale of the building, a new on-site manager who decides to re-paper the files. The request is not a one-time gate. It is a document that has to keep working.
A letter that survives verification is worth more than a letter nobody looked at, because it removes the subject from the table permanently.
So run the check yourself, before you send anything. Three steps, about ten minutes:
Look up your own clinician’s licence. Search your state board’s public database for the name and number on the letter. If you cannot find them in two minutes, a landlord will not either, and the problem is usually that the number or the board is missing from the page rather than that anything is wrong with the licence.
Call the number on the letterhead. Confirm it reaches the practice and that someone there would answer a question about whether a letter was issued. A dead number on a letterhead is a request that fails.
Read the letter as a stranger. Does a sentence in it say what the animal does for a specific limitation? Is there an issue date? Is a diagnosis named that nobody was entitled to ask for? What a legitimate ESA letter contains is the full eight-point audit, and how to verify an ESA letter shows the process from the landlord’s side, which is a useful thing to have read before you are on the other end of it.
If your letter passes all three, send it with a short written accommodation request and stop worrying about the check. If it fails one of them, fix it before it becomes an accusation, what to do when a landlord calls the letter fake is a much worse place to start from than a reissued document.
And if it fails because no clinician ever assessed you, the fix is not a better-looking page. Ask a provider you already see first. They hold the history and the visit is the only cost, though many practices decline these requests as policy. A community mental health centre does the same work on a sliding scale, on an intake designed to begin treatment rather than to issue a document, which is usually slower than a lease conversation allows. Where neither fits the deadline in front of you, a licensed evaluation is designed for that gap. You answer screening questions, you are assessed by somebody holding a licence where you live, and a letter follows only if the assessment supports one. That last condition is what makes the document hold up under exactly the check this page is about. Start with the qualification quiz, which asks what a clinician would ask, before anything is spent.
Frequently Asked Questions
Do landlords check whether an ESA letter is real?
Some do and some never look. The ones who check almost always do the same two things: look up the clinician's licence in the state board's public database, which takes about a minute and needs nobody's permission, and contact the practice to confirm that the letter was actually issued. Neither step touches your medical information, and neither requires you to agree to anything.
Can a landlord call my therapist?
A landlord can call a practice and ask whether it issued the letter. What it cannot do is ask what is wrong with you. Iowa Code § 216.8B(6)(a) bars a request for information disclosing a diagnosis, the severity of a disability, or medical records, and Florida § 760.27(3) does the same. Your clinician is also bound by their own confidentiality rules and will not discuss your care without your authorisation, so a confirmation call is a yes-or-no about authorship.
Can a landlord require a specific ESA letter form?
Not in every state, and it is a bad idea everywhere. Florida § 760.27(3) expressly bars a housing provider from requiring a specific form or a notarised statement, and bars denying a request solely because the tenant did not follow the provider's routine method of making one. Where a landlord offers a form, using it is usually the path of least resistance, but a refusal to accept anything else is a different matter.
What makes a landlord look more closely at an ESA letter?
Missing licence details, a registration or certificate number, a letter dated the same day as the application, an out-of-state licence with no explanation, and language a property manager has seen on other tenants' letters. None of those proves anything, and none is a lawful ground for refusal on its own, but each one is a reason a request gets slowed down while somebody checks.
How long does a landlord have to respond to an ESA request?
Federal law sets no fixed clock, and the HUD notice that once addressed response times was withdrawn in September 2025. Some states fill the gap: Iowa Code § 216.8B(2) requires a landlord to evaluate and respond within a reasonable amount of time, and § 216.8B(6)(e) requires the determination to be in writing. Elsewhere, agencies treat an unexplained delay as the functional equivalent of a denial.
What if my landlord says the letter is fake?
Ask what specifically prompted it, in writing. Most accusations trace to a mechanical defect (no licence number, no letterhead, no date) rather than to a belief that you invented a condition. Fixing the defect ends most of these, and having asked in writing gives you a dated record if it turns out to be something else.
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Support Animal Editorial Team
Reviewed by licensed providers
The Support Animal editorial team researches ESA and PSA regulations nationwide. Every guide is fact-checked against federal and state law and reviewed by licensed providers before publication.



