Cancellation key

A cancellation key (also called X-er or Dreier ) is a key with which a cash register in a retail store or fast food chain can be activated to cancel a booking.

In supermarkets with several checkouts, often only one of the people employed there has a cancellation key. This measure is intended to prevent cash register manipulation, which is particularly easy to do in the case of cancellation processes: By comparing the booked items with the amounts of money collected, the correct flow of the cash register processes can in principle be checked. However, if paid items are subsequently canceled unnoticed by the customer, the corresponding amount could be stolen without this being noticed in the final invoice.

Depending on the cash register system, a cancellation is also possible without a cancellation key, provided that the incorrect booking is noticed immediately ( immediate cancellation ). In some shops, especially in supermarkets, a so-called cancellation card is also used. This is a plastic card with a barcode printed on it. With the help of this barcode, the cancellation can be confirmed via a scanner .