In the case of known holding devices for shopping chips, there is the problem that is often forget, the removed chip according to again into the receiving device has been used to introduce. The missing chip will then in the next shopping for a time-consuming replacement acquisition. It is the object of the invention, the user / withdrawers (m / w) of the chip to the return automatically to remind you.In order to enable the withdrawers (m / w) of the chip on the return of the pilot, the system (1) by way of signal transmitter (4 + 5), the automatically, after removal of the chips are activated. In the illustrated exemplary embodiment, a light-emitting diode (5) and an interval controlled beepers (4) via a microswitch (3) is switched on, as soon as the chip (2) from the system (1) is removed from.The system is intended for installation in motor vehicles (motor vehicle). The withdrawers (m / w) of the chip placed the purchase, and automatically return to the motor vehicle, the chip to be fed again to the system. By means of a connection of the system with the electrical signal transmitters and sensors of the motor vehicle, there are numerous design possibilities for the type, duration and mode of operation of the return signals includes given.
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