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is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation.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 Do You Get a Therapy Dog for Depression and Anxiety? Do Dogs Know They’re Dying? Do Emotional Support Animals Pay Pet Rent? Can Dogs Sense Depression? [therapypet_step1_form show_in_mobile="1"]