Does ESA Letter Have to Be Renewed March 11th, 2021 Yes. ESA letters are valid for one year. The recommended practice is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation. Related Posts Is Emotional Support Animal Legit? Do Dogs Forget People? What do Autism Therapy Dogs Do? Can I Take My Emotional Support Dog to Stores? [therapypet_step1_form show_in_mobile="1"]