Patent ID: 8531295

Claim:
A security system (SYS) for a sales facility having at least one first equipment (CP) to issue a proof of payment for items and/or services purchased and having at least one second equipment (CTR) for inspecting the proof of payment, wherein the first equipment (CP) generates an electronic proof of payment in the form of an identifier (CD) and has a transmitting device (CP-S) that sends the identifier (CD) wirelessly to a mobile device (M), wherein the second equipment (CTR) has a receiving device (CTR-R) that receives the identifier (CD) wirelessly from the mobile device (M) and an optical image scanning device (SCN); wherein the first equipment is a register system (CP); wherein the second equipment (CTR) is a control system installed in an exit area of the sales facility; wherein the transmitting device (CP-S) and the receiving device (CTR-R) both perform wireless data transmissions including at least one of near field communication and Bluetooth data transmission; and wherein the optical image scanning device (SCN) performs optical data transmission including barcode scanning.