An undercover reporter is a journalist who disguises themselves as someone else to investigate and gather information about something or someone secretly, without their true identity being known. Full definition
What's perhaps most surprising is that political figures are still being caught out by undercover reporters in this way. (politics.co.uk)
The government has been facing pressure to do more to cut the number of failing care homes after recent scandals found by undercover reporters. (premierchristianity.com)
The Channel 4 report showed CEO Alexander Nix telling undercover reporters posing as prospective Sri Lankan clients that his company could potentially entrap politicians by setting them up with attractive women and filming the encounter. (money.cnn.com)