as CADBOT says, there is no license (or even standards body who could lobby for / issue one). You're allowed to ask what tasks the animal performs, then deny se

as CADBOT says, there is no license (or even standards body who could lobby for / issue one). You're allowed to ask what tasks the animal performs, then deny service so long as accommodations are made. The correct solution is for businesses to grow a backbone and do that for all animals all the time until people gaming the system with fake ESAs give up.