<i>&quot;That&#x27;s because as banks mail out the new cards embedded with metallic chips en masse, thousands of credit card numbers are changed in the process.&quot;</i><p>Something doesn&#x27;t make sense here. There&#x27;s no inherent reason they&#x27;d need to change the account number on a credit card to replace it with a chip version. So far, I&#x27;ve received chip versions of two of my credit cards (one Mastercard and one Discover card), and they both have the same account numbers they had before.