You are not allowed to deny housing, in New Hampshire, to anybody with a disability that requires the use of a service dog or an Emotional Support Animal (ESA) unless these accommodations are completely unreasonable. If someone is trying to pass off a dog as a fake ESA, as a landlord you should always asking the question “Are they a service dog?” and if they are not, ask for paperwork. Service dogs are not required to have documentation but ESA’s are, and to make sure it’s legitimate, it should be written on the provider’s official letterhead and include their license number and practice address.
Only a dog can be a service dog, but any breed. ESA’s can be any animal, not just dogs, and do not have to be trained, therefore they are not afforded as many protections under the ADA as service dogs. The Fair Housing Act is what defines what a landlord can and can’t do and what accommodations they need to provide. You are not allowed to limit the breed of any animal the tenant might have for a service dog or ESA and must still accommodate that person.
You are not allowed to charge pet fees for either a service dog or ESA, and you are not responsible for any damages the animal may incur, however, you may not charge a security deposit or other additional charges for this reason. If there are any issues with damages to a person (like if the dog bites someone) the owner of the dog is liable for this, not the landlord.