Emotional support animal dog tags are also provided by many websites, but ID tags aren’t required by law. 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. The individual must require the ESA to be able to conduct major day-to-day living activities. The animal needs to be vaccinated with respect to state and local laws. Emotional Support Animals offer some therapeutic benefit to someone with depression or anxiety.