Originally published 2021-05-17. Reviewed and updated by Anything Pawsable on October 4, 2026.
A person's appearance, diagnosis or choice of dog is not a reliable test of service-animal status. Staff should use the rules for the actual setting.
For ADA-covered public settings
When the dog's role is not obvious, staff may ask whether it is a service animal required because of a disability and what work or task it has been trained to perform. The work must relate directly to the disability.
Staff may not demand a diagnosis, certification, registration or a task demonstration under this rule. A purchased ID is not proof, and a dog does not need a vest.
Respond to actual behavior
Service dogs must be housebroken and under control. If a dog is out of control and the handler does not take effective action, or is not housebroken, it may be excluded. The person must still be offered the goods or services without the dog.
Allergies or fear alone are not grounds for exclusion. Where necessary, try to accommodate affected people in different areas without automatically denying either person's access.
A member of the public should give the team space and report an actual safety concern to staff rather than demanding private information or staging a test.
Service Dog Standards works alongside the Americans with Disabilities Act (ADA), providing training and behavior standards and education about human-handler responsibilities. Trainers use that foundation to prepare clients for safe, responsible public work. It can also help staff understand what service-dog teams are preparing for. Use it as educational context; a business cannot make participation in SDS a condition of ADA access.
Use the right legal framework
Housing, employment and flying have different rules. A statement that documentation can never be requested anywhere would be inaccurate. Get current, setting-specific guidance when a question falls outside ordinary ADA public access.