UK grocer Safeway said today [Tuesday] it will launch the PIN card payment system in its 500 stores by the end of this year. The payment system, which has been popular in stores on the European mainland for years, offers customers the chance to pay by tapping in a secret PIN [personal identification number] code to validate their payment instead of signing a credit card chitty. The security of transactions performed using this method is greater than that of transactions carried out with a signature.