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is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation.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 Can Dogs Tell If You Don’t Like Them? What Does it Mean When a Dog Rests His Head on You? 10 Awesome Facts About Cuban Dogs You Will Love to Read 10 Best Harnesses for Small Dogs You Should Buy [therapypet_step1_form show_in_mobile="1"]