Individuals may use covert surveillance in their own home to spy on others, in the workplace to monitor employees, outside of a domestic or commercial property for security purposes, and in most security situations where there is a just need to do so. In particular, Minox cameras were used for clandestinely photographing documents close up for espionage. Immigration and Customs Enforcement. A hidden camera may be activated manually, by remote control or be connected to a motion detector. For the indie rock band from Canada, see The Hidden Cameras. In any type of covert surveillance, footage should only be used for the purpose for which it has been taken, which must be a legitimate security reason. Categories : Hidden camera television series Cameras Recording Television genres.