Public Access
The two-question rule: what businesses can (and cannot) ask about your service dog
Under the ADA, a business is allowed to ask exactly two questions about your service dog. After that, they're done. Here's the rule, why it exists, and how to handle the situations where it gets misapplied.
April 15, 2026 · 4 min read · By NSAR Editorial
A staff member at a grocery store stops you. "Is that a real service dog? Can I see his certification?"
Under the Americans with Disabilities Act, that question is one they're not allowed to ask. They can ask two specific questions — and only two — to figure out whether your dog qualifies under the ADA. After that, the inquiry is over.
We've been the trusted authority on service-animal credentialing for thirty years, and we've watched this rule get misapplied roughly 100,000 times. Here's the rule itself, why it exists, and what to actually do when a business gets it wrong.
The rule
From 28 C.F.R. § 36.302(c)(6), summarized by the DOJ:
"A public entity or private business may ask only two questions: (1) is the dog a service animal required because of a disability, and (2) what work or task has the dog been trained to perform?
Staff are not allowed to request any documentation for the dog, require that the dog demonstrate its task, or inquire about the nature of the person's disability."
That's the entire allowed inquiry. Yes/no on question 1. Short answer on question 2. End.
What's not allowed
The same regulation is explicit about what staff can't do:
- Ask for paperwork, certification, or registration
- Demand that the dog demonstrate its task
- Ask about the nature of your disability
- Require a vest, ID badge, or specific gear
- Charge a fee that wouldn't apply to other customers
Every one of those is on the DOJ's "what businesses cannot do" list. Staff who do them anyway aren't being malicious — they're working from outdated training, social-media misinformation, or the entirely-understandable desire to keep things consistent for everyone. But the law is the law.
Why the rule is so narrow
The two-question rule exists precisely because the broader question — "is your disability real?" — is one businesses are not equipped to evaluate, and the alternative (a federal registry, mandatory ID, government-issued cert) was rejected when the ADA was written.
The DOJ's reasoning at the time was straightforward: a registry or ID system would create a barrier to people with disabilities exercising their rights, and the rare case of fraud doesn't justify the friction. So the rule traded "verify rigorously" for "ask two questions and move on." Most businesses follow it. The few that don't are the ones we end up writing letters to.
What to actually do when staff misapply the rule
Stay calm and answer the two questions
Even if the question they asked wasn't one of the two, answer the two anyway. Most of the time the staff member is reaching for the right thing and doesn't quite know what it is.
Staff: "Where's your dog's certification?" You: "She's a service dog required because of a disability. She alerts me to oncoming panic episodes."
You answered the two questions even though they didn't ask them. Eight times out of ten, the staff member nods and moves on.
If they push for paperwork, name the rule
"Under the ADA, businesses can ask two questions and the dog is allowed in. I've answered them. I'd be happy to speak with a manager if you have additional concerns."
Asking to escalate to a manager is not aggressive — it's exactly the right move. Managers are typically better-trained on the rule than line staff, and the request signals that you know what you're talking about.
If they refuse you entry
Document immediately:
- Name of the staff member or manager
- Time and location (the specific store, address, register or area)
- What was said, as close to verbatim as you can recall
Then leave. Don't argue further. The escalation path isn't on-site; it's a complaint filed at ADA.gov/file-a-complaint. Free, online, takes about 15 minutes. The DOJ takes ADA complaints seriously, especially against chain stores — a single complaint can trigger a national review of the company's training.
What you can also do
Most businesses respond well to being told they're wrong, in a friendly tone, with a citation:
"Quick heads-up — under 28 CFR 36.302(c), the only two questions about a service dog are 'is the dog required because of a disability' and 'what task is the dog trained to perform.' Asking for certification isn't allowed under the rule. Worth a check with your store training team."
You'd be surprised how often this email gets a polite "thank you for letting us know, we'll update our training" reply. Companies generally don't want to be wrong on this; they're often just behind on it.
What about a vest? An ID? An NSAR registration?
None of these are required by the ADA. The dog itself — trained, behaved, doing real task work — is the qualification.
That said, in practice they help. A visible vest signals "service dog" to the world before anyone has to ask. An NSAR registration ID, verifiable on our public site, defuses about 90% of pushback before it starts. Not because the law requires them — because human nature does. People look for visual signals; signals reduce friction.
Optional, useful, never legally required. That's the right way to think about it.
The short version
Two questions. Yes/no on the first. Short task description on the second. No paperwork, no demos, no diagnosis disclosure, no vest requirement. If staff push past the two questions, name the regulation; if they refuse you, document and file with ADA.gov.
You don't have to be a lawyer to invoke this rule. You just have to know it cold.