Credit Card security at gas pumps
For what it is worth. Apparently you cannot tell if devices like this are being used by the criminals. Bluetooth skimmer
Forum Discussion
Credit card skimmers at gas pumps doesn't necessarily have anything to do with employees. The crooks simply open the pump at night when the station is closed and install the skimmer. If you look at a pump next time you get fuel, you'll see varying styles of locks (trying different types) and "tear" labels that tear off if the door is opened and are not reusable.
