Is there a governmental body that certifies service dogs? We have had some issues with a customer at my work who brings in a service dog but doesn't control her well (doesn't hold the leash, holds it so she is as far away from him as possible and the leash is blocking aisles, allows the dog to lay down blocking aisles) and when we ask him to keep her by his side he says she is a government-certified service dog and we can't make him take her out or do anything else with her. I didn't think there was such a thing as a government-certified service dog but I'm having trouble finding info online.
The answer is generally no, there is not a mandatory and/or federally recognized registry. There are other registries, some with meager government ties that the person could be referring to, or they could have just been scammed by an online registry.
Whatever the situation, no registry would stop you and your coworkers from asking him to correct the behavior of the dog or asking him to remove the dog if he cannot correct the behavior. Service dogs cannot alter the main function of a public entity that they enter, and that includes blocking aisle so people can’t get where they need to go.
Here are the basic service dog laws (note the .gov) and you can see it clearly says the dog must be under control and the handler not controlling the dog is one of the few times you can request the service dog be removed from the premises. While a leash is not necessarily needed to control the dog, if they are leashless the dog must then be controlled by voice or body commands.
To do this properly, you must first request the handler take effective means to control the dog and give them a chance to do so. If he does not, you may then ask him to remove the dog while giving him the chance to return and obtain goods or services without the dog.
-Jade






