The confusion the internet creates
Search for “service dog” and you’ll be flooded with sites offering certificates, ID cards, vests, and “official registrations” — often for a quick fee. It looks legal and reassuring. It isn’t. None of those products give your dog any legal status, and buying one can leave you worse off when a landlord asks for real documentation.
Here’s the simple truth: there is no official service dog registry in the United States. A dog becomes a service dog through training, not registration.
PSD letter vs certificate, side by side
A service dog certificate or registration
- Sold online, usually with no clinician involved and no evaluation.
- Carries no legal weight — it doesn't grant any rights.
- Can't be meaningfully verified, so a landlord can reject it.
- Often paired with a vest or ID card that also means nothing legally.
A PSD letter from a licensed provider
- Signed by a mental health professional licensed in your state, after a real evaluation.
- Documents a genuine disability-related need for a task-trained dog.
- Names the provider and their license details, so it's verifiable.
- Supports a reasonable-accommodation request for housing under the Fair Housing Act.
For a full breakdown of the two animal categories, see ESA vs PSD letter.
Why landlords treat them so differently
When you request to keep a service dog in no-pet housing and your disability isn’t obvious, a landlord can ask for documentation that reasonably supports the need. The one kind of documentation they’re allowed to reject is the kind they can’t verify. A paid certificate fails that test instantly. A PSD letter from a licensed provider passes it, because the provider’s license can be checked. More on that in can a landlord deny a PSD letter.
What to do instead
Skip the certificate. Put your money and effort into the two things that actually matter:
- Train your dog to reliably perform a specific task that helps with your disability.
- Get a real evaluation from a licensed provider and, if you qualify, a verifiable PSD letter. See PSD letter requirements.
Get documentation that holds up
A licensed mental health professional reviews your situation and, if you qualify, issues a verifiable psychiatric service dog letter — with a refund if you don’t qualify.
Start PSD Assessment