Is Fast ESA Letter Legit? March 10th, 2021 Fast ESA letter is considered a trusted source for obtaining an ESA letter, as long as your ESA letter is issued by a licensed healthcare professional. Related Posts Can You Buy a Trained Emotional Support Dog? What is the Best Dog for Emotional Support? What Do I Need to Know about Emotional Support Dogs? Dog Breed DNA Tests: Which Tests Are Best? [therapypet_step1_form show_in_mobile="1"]