They may be medical alert dogs that warn their owners of impending diabetic crises, seizures, etc.

Felon friendly have a service dog for seizures and a yorkie very well trained both of them .

., you can't ask someone who's blind for documentation that they need a seeing-eye dog, but you can ask for proof for someone who claims the need based on something not obvious - epileptic seizure, for example. 

Keep in mind, LEGALLY has only paid $133k, retained all asset's, no liens, no seizures. legally.