You might be entitled to an emotional support dog in case you have emotional or mental illnesses. Both service and emotional support animals could be excluded from the workplace should they pose either an undue hardship or an immediate threat at work. Registration isn’t required by law and doesn’t make your pet an ESA. Emotional emotional support dog certification Support Animal letters are usually considered valid for a single year. Service animals aren’t considered pets. Emotional Support Animals offer some therapeutic benefit to someone with depression or anxiety.