There is no such certification letter. A doctor may issue you a "letter of recommendation" to you - that's for you alone to know. That does not require a landlord to allow you to have a dog and it does not have anything to do with any landlord. You have confused an emotional support animal with an ADA "service animal". There is a world of difference between the two. An ESA is a pet - A PET. A service animal performs a necessary task that you cannot perform because of a disability, and the dog has been professionally trained to perform a specific task. For example, if you have seizures - a trained dog will know when you are about to have one and will alert you, giving you time to summons help. Or, if you are in a wheelchair and cannot lean over and pick up things. A dog can retrieve items for you that are on the floor. You qualify for nothing. If you want to have a dog, move to a "pet friendly" building or buy your own home.
Certified Paralegal, with 25+ years' experience.