Most of the newer threats in gas pumps are all Bluetooth skimmers. They buy a common key. There are six of them out there in the wild. You could buy it on eBay for $15. Open the machine, plug a Bluetooth skimmer, and lock it. In 10 seconds you’re in business. Now nobody ever...
Some places (such as Office Max) require the cashier to take the card from you and enter in the last four digits of the credit card number into their point of sale system. If the numbers on the card are different than the ones scanned into the system, then the sale is flagged...