Method for operating a transponder

Method for operating a transponder, which has a data memory and means of interaction without contact with a base station, the transponder being located in a field of action of the base station (1) and can be disabled (7) or reactivated (16) by the base station by transmitting a command signal (5, 14), characterized by the fact that before the deactivation (7) or reactivation (16) of the transponder is checked (4, 13) the authorization of the base station for deactivation (7) or reactivation (16) by transmitting the transponder (3, 12) from the base station a signal of approval containing a first approval information before transmission command signal (5, 14), so that the transponder receives the signal of approval, and the first approval information is processed by the transponder with second information stored approval in the data memory in order to obtain information authorization and under the authorization information thus obtained, the transponder will decide (4, 13) if the control signal is accepted (7, 16) or rejected (8, 17).