When purchasing a registration or membership, there is an option on the shopping cart page to choose whether to use the credit/debit card on file, or enter a different card (which will then be stored for future use, replacing the card currently on file)
UPCOMING INSTALLMENT PAYMENTS:
If you have upcoming automated installment payments and the credit card on file is no longer valid, the installment will fail when the system attempts to process it. When this happens, you will receive an email with instructions on how to log-in to your account and make the payment manually. When you do this, the credit/debit card you use will be stored for use when processing future automated installments.