No, legally emotional support animals (ESAs) are not required by any federal law to wear a vest, ID tag, harness, badge, or any other identifying gear.
However, some owners choose to use a vest (labeled "Emotional Support Animal" or "Do Not Pet") voluntarily because it:
Helps signal to others (e.g., neighbors or building staff) that the animal has a purpose.
May reduce questions or unwanted interactions
The QR code on your ID tag or card allows immediate verification, making it easy to access your legitimate letter without delays or unnecessary searching.