When I was in a shop today I handed over my HSBC credit card and having swiped it the woman behind the till then shon a blue/purple laser or UV? pen on the top left hand of the face of the card and told me they had to do that as they were getting a lot of cloned cards.
Any ideas what this security feature is, I could understand fake replica cards with details of cloned cards on the strip but intelegent cloners use real cards replacing the contents of the magnetic strip with that of a cloned card so the number on the front doesn't agree with that on the back.
Regards
Chris