A card number is the 16-digit number on the front of your credit card and you use this to make purchases. Your card number only changes when you’re sent a new card. Your card number will stay the same if your card has reached it’s expiry date and you’re sent a renewal.
Your account number always stays the same. When you contact us about your account, or view your details in the M&S Banking App or via Internet Banking, we can see everything you’ve done with your M&S Credit Card. Even if you’ve had a few different card numbers, we can see all of the history under your account number.