A surveillance system comprising an electronic identity card holder 100 and corresponding identity card 170. The card holder 100 comprises a slot 150 for receiving an identity card 170. The slot 150 has a first side 150a and an opposing second side 150b. The first side 150a of the slot 150b comprising a viewing window 140 positioned to allow viewing of the second side 150b of slot 150. The card holder 100 also has a camera housed within the holder 100, and the camera has a camera aperture 196 provided on the second side 150b of the slot 150. The corresponding identity card 170 comprises an optically transparent region 175 that is configured to overlie the camera aperture 196 when the identity card 170 is received in the slot 150 of the holder 100.