I've been contacted by a gp who has started doing Botox and fillers on a mobile basis. He would like me to refer clients on a commission basis. I have zero knowledge about this. I advertise a premium mobile service so I want to make sure my clients won't end up looking like Quasimodo!! What should I be asking him, a portfolio maybe, credentials, am I able to check some sort of register to make sure he hasn't been struck off? What do you think?