The law mandates that the letter must be issued by an MD or a licensed mental health professional. We have a variety of licensed mental health professionals in our network. For a little more information on the laws regarding ESA's and the Fair Housing Act please visit the resources below.
Emotional Support Animal FAQ- https://www.animallaw.info/article/faqs-emotional-support-animals
Assistance Animals in Housing- https://www.animallaw.info/sites/default/files/FHEO_notice_assistance_animals2013.pdf