Label the synthetic ones, and never let one give a testimonial

If the face, voice or scene is generated and meant to read as real, tick the platform’s own AI box — YouTube, TikTok and Meta all require it and detect it anyway. The harder line is separate: a person who does not exist cannot describe using your product. That is a fabricated testimonial, a label does not cure it, and the FTC rule names AI-generated ones explicitly. The same goes for a generated before-and-after: an AI transformation shows a result your product did not produce.