London 'courier scam' victims lose £3m to conmen
5 October 2013 Last updated at 13:00 BST
A so-called courier scam involving people being persuaded to hand over their bank cards to criminals has lost victims more than £3m, since 2011.
New figures from the Metropolitan Police show that 2,967 people in London were targeted from January 2011 until September 2013.
"Courier fraud" involves criminals phoning victims pretending to be from an authority to extract pin details, before sending a courier to pick up their bank card.
They usually tell the victim their account has been compromised and they should call their bank, but the fraudsters stay on the line so when the victim rings out they are still connected to the criminal.
BBC London's Charlotte Franks spoke to fraud victim Andy Welch and detective inspector Gary Miles from the Met Police.