[5][4] Many psychiatric assistance dogs are trained by the person who will become the handler—usually with the help of a professional trainer.
In the US, the Air Carrier Access Act has permitted psychiatric service dogs to travel in the cabin with their handler.
The Americans with Disabilities Act (ADA) does not require service dogs to be registered or certified.
Handlers are not legally obligated to obtain or carry any specific documentation for their Psychiatric Service Dogs.
However, having such identification can be helpful in situations where proof of the dog's training and status may be required, such as when traveling or accessing certain public accommodations.