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is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation.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 How Does an ESA Help with Anxiety? Best Diet for Dogs That Are Service Animals What do Autism Therapy Dogs Do? What Privileges Do Emotional Support Animals Have? [therapypet_step1_form show_in_mobile="1"]