@Kierstin Baker I remember a different thread on this topic for service animals at https://www.biggerpockets.com/forums/52/topics/368... and here is what @Brian Simmons wrote so not sure if this would apply to your situation:
I have had to deal with this on two separate occasions.. Here is what we did. First off, many tenants will try to get a note online or through a paper mill type company. It is my understanding (via lawyers) that the note has to come through an individual with reasonable and professional responsibility for the mental or physical care of the individual.. That doesn't mean it has to be a doctor, but it does have to be someone who can be verified by the landlord and has some sort of professional standing. (Aka an actual person)
So back to what we did that worked exceedingly well on both occasions. (Once a physician, once a counselor)
Our lawyer sent the care giver a certified letter and a call informing them that any liability from a lawsuit resulting in an injury from a vicious breed animal they approved as a service animal would mean we in turn would be including them as liable on the given suit, and to please forward us a copy of their liability limits..
In both instances letters were immediately withdrawn.. In one instance we got a certified letter back stating we should reject the previous pet approval IMMEDIATELY..