Refueled
Three years ago I worked at a grocery store as a cashier and they had a system where every dollar spent was put towards a point system to give you discounts on their gas. You also got discounts on specific items with the card. They tracked our employee cards so we couldn’t sneak some free fuel points.
But my mom’s old phone number was still linked to an account, so whenever a customer didn’t have an account (which was free) I would just type in my mom’s old number and say it was the store code to give them discounts. I paid next to nothing for gas while I worked there and never got caught.