Prices far below everyone else
Injectables and devices have real costs. A price well under the market often means diluted product, counterfeit product, or an undertrained injector working without proper supervision. Legitimate practices run promotions on occasion. A permanent price far below the field is a warning.
No clear answer on who supervises treatment
Ask who the medical director is and you should get a name. A practice that dodges the question, or where no physician is involved in a state that requires one, is operating outside the rules. How they handle this tells you how they handle the rest of their obligations.
Pressure to book or pay on the spot
Hard upselling, today-only pricing, and pressure to commit before you have thought it through are sales tactics. A good provider is comfortable with you taking time to decide.
Treatments performed by staff you cannot identify
You should be able to learn the name and license of the person treating you before they begin. Practices that stay cagey about who does what are usually hiding that the treatment is delegated to someone not licensed to perform it.
Product that stays out of sight
A reputable injector will show you the sealed product and the brand. Refusing to let you see what is going into your face is a serious red flag.