If they got caught doing that, both VISA and Mastercard will essentially ban them. At least if it is an insecure as you make it sound and they haven&#x27;t met PCI DSS.<p>So instead of storing known gotcha cards in these databases, a likely better solution would be to discontinue the use of these databases.<p>Most major retailers don&#x27;t store credit card numbers. The full information never leaves the terminal, and is discarded when the transaction is complete.<p>PS - Thanks for &quot;Not downvoting&quot; but why would you anyway? Nothing I said contradicts anything you&#x27;ve said. I said large retailers aren&#x27;t storing CC information. Are you claiming they do? If so, name names.