We use an automated reservation management system and all payments are processed automatically on the dates indicated on your reservation confirmation and invoice.  You do not need to do anything as our system will automatically debit the card of record and send a notice to you about the payment.  If you wish to make your final payment on a different card you must do this BEFORE the due date on your invoice.  To update your card inforamtion simply access your guest area of the reservations system and make your update there.