Worth mentioning as always, thanks PP.
After 12 years in retail management I think I’ve seen every single scam going, the main thing is to stick by the rules of the CC companies/clearing houses.
I used to work in a big DIY store and we followed every rule to the letter but people are very inventive and new scams start all the time.
One big one is to always make sure you keep your pre-printed till rolls under lock and key, giving them out only when a cashier shows they need a new one. Have a guess why! (pretty simple to work out…)