In 'My Account' --> 'My Betfair Account' --> 'Payments' --> 'Card Details' --> 'Edit' you can view and amend your card details. You can amend certain parts of your card details while some information cannot be changed:
Changeable card details:
Unchangeable card details:
If you receive a new card from your bank with the same long card number as the previous one, then you simply can change the expiry date (and start date).
If the long card number has changed from the previous card, you will need to register the card as a new card.
In 'My Account' --> 'My Betfair Account' --> 'Payments' --> 'Card Details' --> 'Remove' you can unregister your old card. Depending on the net deposits of your card details, the length of time the card has been registered, or if you have not completed the KYC verification process you may be required to supply some documentation in order to unregister your old card. Please see “Why can I not remove my (expired) card?" for further information.
If you are unable to delete the card from your account, please contact us so we can advise you further.