A service dog is a dog individually trained to do work or perform tasks for a person with a disability. That training, not a registration, certificate, vest or ID card, is what gives the dog its legal status under the Americans with Disabilities Act (ADA). This section explains the rules in plain English, with every claim sourced to the regulation, the agency or the statute.
What is a service dog?
The ADA regulation defines it in one sentence and then rules out what does not count:
"Service animal means any dog that is individually trained to do work or perform tasks for the benefit of an individual with a disability, including a physical, sensory, psychiatric, intellectual, or other mental disability. ... The crime deterrent effects of an animal's presence and the provision of emotional support, well-being, comfort, or companionship do not constitute work or tasks for the purposes of this definition."28 CFR 36.104
Three things follow. Only dogs are service animals under the ADA (miniature horses have a separate rule). Any breed can qualify. And the task must be directly related to the handler's disability. Examples and the fine print are in ADA service dog laws and service dog tasks.
Service dog, psychiatric service dog, emotional support animal, therapy dog
- Service dog: trained to perform tasks for a person with a disability. Full ADA public access.
- Psychiatric service dog: a service dog whose tasks relate to a mental health disability, for example interrupting a panic attack. DOJ says a dog "trained to sense that an anxiety attack is about to happen and take a specific action" qualifies. See psychiatric service dogs.
- Emotional support animal: helps by being present, with no trained task. No ADA public access; housing depends on state law and a provider's statement. See ESA vs service dog.
- Therapy dog: a pet that visits places with its owner to comfort other people. It does no task for its own handler's disability, so it is not a service dog. See therapy dog vs service dog.
Where can a service dog go?
Almost anywhere the public can go. Under 28 CFR 36.302(c)(7), handlers may go "in all areas of a place of public accommodation where members of the public, program participants, clients, customers, patrons, or invitees, as relevant, are allowed to go." That includes restaurants and grocery stores even where health codes ban animals, hotels (with no pet fees and no restriction to pet rooms), and hospital patient rooms. The narrow exceptions include sterile areas like operating rooms and some zoo exhibits. Religious organizations are exempt from the ADA, though state law may apply. Place by place: are service dogs allowed everywhere?
What can staff ask?
When it is not obvious what the dog does, staff may ask only two questions: is the dog a service animal required because of a disability, and what work or task has it been trained to perform. They may not ask about your disability, demand documentation or ask the dog to demonstrate a task. A business may remove a dog only if it is out of control and the handler does not take effective action, or if it is not housebroken. Full detail and scripts for both sides: what businesses can ask about a service dog.
No registration, certification, vest or ID is required
This is the part most websites in this market get wrong. The ADA does not require any of it, and DOJ says mandatory registration of service animals "is not permissible under the ADA." On the documents sold online, DOJ is direct:
"There are individuals and organizations that sell service animal certification or registration documents online. These documents do not convey any rights under the ADA and the Department of Justice does not recognize them as proof that the dog is a service animal."DOJ ADA service animal FAQ, question 17
That applies to every registry, ours included. Read service dog registration, service dog certification and service dog ID cards for the details, and are service dog vests required? for gear.
Training: who can train a service dog?
You can. DOJ says people with disabilities "have the right to train the dog themselves and are not required to use a professional service dog training program." There is no required test or trainer license. What the law does expect is a dog that is trained for a task and behaves in public: under control, housebroken and on a leash or tether unless that interferes with the task. The training section covers owner training, public access skills and dogs in training. If you are starting from zero, begin with how to make your dog a service dog.
Flying, housing and work follow different rules
- Flying: the Air Carrier Access Act, not the ADA. Airlines may require the DOT Service Animal Air Transportation Form and may limit a passenger to two service animals. Dogs in training are not service animals for the form. See flying with a service dog.
- Housing: the Fair Housing Act and state law. Landlords must generally make reasonable accommodations for a trained service dog in a no-pets building. See service dogs in apartments.
- Work: ADA Title I treats a service dog as a reasonable accommodation request, and employers may ask for documentation when the need is not obvious. See service dogs at work.
State law and misrepresentation
States can add rights on top of the ADA. Many give access to dogs in training, which the ADA does not. And passing off a pet as a service dog is an offense in at least 36 states; in Nevada it is a misdemeanor with a fine of up to $500 (NRS 426.805). See fake service dog laws and service dog laws by state.
Licensing and vaccination still apply
A service dog is still a dog in the eyes of local law. DOJ says service animals "are subject to local dog licensing and registration requirements" and that handlers "are not exempt from local animal control or public health requirements." That is ordinary dog licensing, the same for every dog, and some places waive the fee for service dogs. It is not a service dog registry.
All guides in this section
- Service dog registration: is there an official registry?There is no official service dog registry in the US and the ADA does not require one. What makes a dog a service dog, and what a voluntary record can do.
- Service dog certification: is it required, and does it exist?No service dog certification exists or is required under the ADA. What does exist: training, the DOT form for flights, and a few state tags.
- Service dog ID cards: required, useful, or neither?No law requires a service dog ID card, businesses cannot demand one, and airlines use the DOT form. What a card can still honestly do.
- Are service dog registries legit?Service dog registries are private businesses, and none gives your dog legal rights. What they sell, the warning signs, and how to check any site in two minutes.
- ADA service dog laws: the rules in plain EnglishThe ADA definition of a service dog, where it can go, when a business may exclude it, leash rules, fees, and why no certification is required.
- Service dog requirements: what the law actually asks forThe real service dog requirements under the ADA: a disability, trained tasks and control in public. Plus flying rules and the requirements that do not exist.
- What businesses can ask about a service dog, and what they can'tUnder the ADA staff may ask only two questions about a service dog and may not ask for papers. When a dog can be removed, plus scripts for both sides.
- Fake service dog laws: is it illegal to pass off a pet?Passing off a pet as a service dog is an offense in at least 36 states. What counts, including vests and papers, the penalties, and why it hurts real handlers.
- How to make your dog a service dog: the honest roadmapNo form, fee or vest turns a pet into a service dog. It takes a disability and task training. Here is the real roadmap, and how long it takes.
- Service dog tasks: examples, and what counts as a taskA service dog task is a trained action that helps with a disability. Comfort is not a task. Examples for mobility, medical and psychiatric needs.
- Service dogs for anxiety: does anxiety qualify?Anxiety can qualify for a service dog only if it is a disability and the dog is trained to do a task for it. Calming by presence is not a task.
- Service dogs for PTSD: tasks, VA benefits and no-cost programsPTSD can qualify for a service dog when the dog is trained to do tasks for it. Common tasks, what the VA does and does not pay for, and programs.
- How much does a service dog cost?Program dogs cost tens of thousands to train, yet some nonprofits place them at no cost. Owner training, insurance, taxes, and what never to pay for.
- Service dog breeds: which breeds can be service dogs?Any breed can be a service dog under the ADA, and breed bans must make an exception. What matters is temperament, health and the task.
Common questions
What qualifies a dog as a service dog?
A handler with a disability and a dog individually trained to do work or perform tasks directly related to that disability. Nothing else is required under the ADA.
Can any breed be a service dog?
Yes. DOJ says any breed can be a service animal, and a breed ban must make an exception unless that particular dog is a direct threat.
Is an emotional support animal a service dog?
No. Comfort by presence is not a trained task, so ESAs are not service animals under the ADA.
Does a service dog need to wear a vest?
No. DOJ says the ADA does not require a vest, ID tag or specific harness.
Can a service dog be denied entry?
Only if it is out of control and the handler does not take effective action, or if it is not housebroken. Allergies and fear of dogs are not valid reasons.
Sources
- 28 CFR 36.104, definition of service animal
- 28 CFR 36.302, service animals in public accommodations
- DOJ, ADA Requirements: Service Animals FAQ
- DOJ, ADA 2010 Revised Requirements: Service Animals
- DOT final rule on traveling by air with service animals, 85 FR 79742
- Nevada NRS 426.805, misrepresentation
General information, not legal advice. Policies and laws change; follow the sources. Last checked September 25, 2026.