Inside the letter
A well-drafted ESA letter is short and precise. It states that the clinician has evaluated you; that in their professional judgment you have a disability within the meaning of fair housing law; and that an emotional support animal is part of managing it. It identifies the clinician fully: license type, number, jurisdiction, contact, signature, date.
Just as important is what it doesn't say: your diagnosis. The letter documents that a qualifying condition exists, not which one. Your medical privacy stays intact, and a housing provider isn't entitled to more.
From the landlord's side: a verifiable professional attestation they can accept without seeing your medical history — which is precisely why the licensing details matter and why anonymous certificates fail.
The letter's actual powers in 2026
The evidentiary foundation of a reasonable accommodation request: the exception to no-pet policies, and in states that still prohibit them, the basis for waiving pet fees. How much force that carries now depends on your state — states with their own assistance-animal laws changed little in May 2026; federal-framework states run on your written request and preserved private claim.
In the air: nothing, since January 2021. In public places: nothing, ever — shops and restaurants are trained-service-animal territory. As a guarantee: it never compelled any landlord; it supports a request and a claim.
Whose signature counts
Licensed clinicians: psychiatrists and other licensed physicians, psychologists, licensed clinical social workers, licensed professional counselors, marriage and family therapists, psychiatric nurse practitioners — licensed in your state, which several states require outright and every scrutinizing landlord checks. Your existing therapist can often write one; telehealth evaluations are widely accepted and expressly recognized in some state statutes, including Florida's.
Common questions
Current as of August 24, 2026.
Is an ESA letter a legal document?
It's a clinical document with legal significance: the documentation fair housing law recognizes for accommodation requests. It's not a court order or a license; its force comes from the licensed professional's attestation.
How long is an ESA letter valid?
No federal expiration exists, but practice and several state frameworks expect recency. Within a year is the working standard landlords and universities apply. Treat renewal as annual.
Does an ESA letter name my animal?
It can mention the animal, but the determination is about your clinical need, not the animal's identity. You don't need a new evaluation because you got a new dog.
Is an online ESA letter legitimate?
A telehealth evaluation by a clinician licensed in your state is legitimate; states like Florida recognize telehealth documentation by statute. An instant letter with no live evaluation is not, wherever it came from. The delivery method isn't the test; the evaluation is.
What's the difference between an ESA letter and ESA certification?
The letter is real; certification isn't. No official ESA certification or registry exists anywhere in the U.S.
One conversation is the whole process
If an ESA might be right for you, a licensed clinician can tell you, and if it is, your letter is emailed the same day their review completes.