Could someone explain why putting a shopping bag over a debit car make it readable for the scanner? I've always wonder why this is, and I'm almost certain it has to do with physics.
I've never heard of that trick, but I know of a few instances of cellophane tape being applied. From what I've seen, the fault usually lies in the reader, not the card itself. Cards work some places and not others, so I suspect that some readers have more discrimination than others and are more sensitive to imperfections. I thought that the tape might help to stabilize micro-fractures in the magnetic material, but a bag wouldn't do that. Maybe it just covers surface irregularities that would cause the card to 'skip' a bit due to uneven contact with the reader slot.Hybird said:Could someone explain why putting a shopping bag over a debit car make it readable for the scanner?
Antiphon said:The magneitc stipe must be very close to the scanning head to make
a successful read. Even a bag's thickness is too far away.
Kazza_765 said:No this happens to me quite regularly. My card works everywhere except at the 7/11 just down the road. Everytime I go there the guy behind the counter gets a plastic shopping bag, puts it over my card and presto, it goes through. I don't have any idea why, but this trick certainly does work.
Oh I see. I had it backwards.