The security label can be fitted to an object (2; 20; 71; 80) and comprises an electronic circuit (12) and a conductor loop (10; 31; 48; 62) which is connected to the circuit (12). The conductor loop (10; 31; 48; 62) is arranged in such a manner that it is interrupted when the object (3; 22; 49) is used as intended. The object may be, for example, a blister pack (71) or a syringe (80).