How does a new bank card know whether you have entered your pin once to then activate contactless payments? And how did all bank cards know when the contactless limit on card went up from £30 to £45 in the UK?

Question

A customer asked me this at work and I didn’t know the answer!

In: Technology

Answer 1

Your bank card holds very little information. It’s the retailer terminal and the bank systems that know the limits and what has been activated etc after they identify the card.