I love PayPass. Paying takes just a few seconds, no PIN or signature required for small transactions, and best of all I don’t even need to pry the card out of my wallet, just need to place the wallet on the reader.
I have a savings account debit card for ATM use, and a credit card that I use to collect points. Both cards are PayPass-enabled. When I hold my wallet to the reader in a shop, it sometimes displays an error message saying that it detected multiple cards in range, or it randomly picks one of the two cards for the payment. However I only want to use my credit card for wireless payments. What to do?
Simple: I disabled PayPass on the debit card, while keeping the chip and the magnetic stripe intact. I noticed a small aerial around the chip on my card, and used a regular paper puncher to remove a part of it (on the top left), without severing the actual chip or its connector plates. This was enough to prevent the card reader from wirelessly energising the chip and it doesn’t detect the card anymore. Inserting the card into the chip reader or swiping the magnetic stripe still works though.
Disclaimer: If you break your card, I won’t replace it. Your card’s aerial may be routed differently through the plastic, so this method may not apply to all cards (you can see that in this awesome X-ray picture).