hand using contactless card
Media playback is unsupported on your device
Video

Researchers find Visa contactless payment 'security flaw'

Researchers claim they have found a security flaw with Visa contactless payment cards.

In the UK, people can make purchases up to £20 by just touching the card against a machine - without needing to enter a PIN.

However, the researchers say that a glitch means Visa's cards will approved unlimited spending if it is put through in a foreign currency.

Dan Johnson reports.

Go to next video: Consumers 'hesitant' about cashless payments