The reasons to refuse debt or credit card are mentioned below:   • If the card number in invalid (May be the result of a typo).   • If the card does not have sufficient credit balance remaining to pay for the order.   • If the billing address that is entered in the order form does not match with the address in your debit or credit card statement.   • If the expiration date of the card is not entered right.   You can contact your debit/ credit card issuing bank for any further clarifications.