Hi Toby, According to the Fair Housing Act, valid service animals and emotional support animals are not considered pets and thus are exempt from standard pet policies like extra pet fees or weight and size restrictions, or a no pets policy. Although rare, some jurisdictions may have laws in place allowing single family landlords and apartment complexes under 4 units to Registering your dog with us may not be necessary as all that is required by the ADA is verbal assurance that your dog is a service dog, and with emotional support dogs, you may only need a letter from a therapist to show your landlord on top of any registration papers.