> ... Target storing CC numbers at least made sense when you needed to make a return. This is why I think the merchant processors should be instead be doing th

> ... Target storing CC numbers at least made sense when you needed to make a return. This is why I think the merchant processors should be instead be doing this by some kind of transaction ID. I.e. send the refund amount to the processor with the transaction ID instead of sending a new transaction to the card. It's more secure, and less error prone since you could build in checks for the amount returned and other such bits.