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 Rules You Need To Follow When Flying With Your Pet on AA How Often Do I Need to Renew My ESA Letter? What is the Cleanest Pet to Own? What are the Benefits of an ESA Letter? [therapypet_step1_form show_in_mobile="1"]