I commiserate with those of you who want to keep your guest accommodations allergy free. I do, too, plus I worry about dogs interacting with my two dogs which are very large and friendly, but would not appreciate a strange dog on their property. I have found a way to dissuade emotional support dogs which is part of Airbnb‘s rules.
When I get a request for booking with an emotional support dog, I reply that I would be happy to welcome them if they agree with three stipulations. First, according to Airbnb regulations, the emotional support dog cannot be left alone in the apartment for any length of time. Second, went outside the apartment, the dog must be leashed to avoid interactions with my dogs. And third, if the dog causes any damage whatsoever to furniture, walls, doors, or carpet, the guest must pay to have the item repaired or cleaned.
So far, not one of those inquiring guests has actually booked. I also thought about requesting a copy of their emotional support animal certification, and I may do that in the future. Onward!