Ask for the name and license of the person doing the injection or laser, then look them up free on the Florida DOH MQA License Verification portal (status, discipline, complaints). Ask who the medical director is and look them up the same way.
Check the business on AHCA's FloridaHealthFinder facility search under Health Care Clinic or Health Care Clinic Exemption, and on Sunbiz for an active corporate registration matching the name on the door.
Red flags: no medical director named, Botox or fillers priced far below market, products of unknown origin, treatments done in a home or hotel, and refusal to give license numbers.