An electronic seal (100), housing (1) for a transponder (200), which may form part of an electronic seal (100) and a transponder device is provided. The electronic seal (100) has a sealing mechanism (5). A transponder receptacle (50), and an actuator (4) are provided by or with the housing (1). The actuator (4) is actuated upon engagement of the sealing mechanism (5) to render the transponder (200) operable. The transponder receptacle (50) may hold the transponder (200) so as to extend into three planes.