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is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation.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 Steroids for Dogs: Pros and Cons Can You Give Fexofenadine to Dogs Suffering from Allergies? Are Online ESA Letters Legal? Why Do Dogs Lick You? [therapypet_step1_form show_in_mobile="1"]