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 Why Do Dogs Lick You? Does ESA Letter Have to Be Renewed Do Dogs Forget People? Can Dogs Take Allegra? Find Out Here! [therapypet_step1_form show_in_mobile="1"]