This error occurs when the credit card number or card verification code is not in the correct format.

The card number must be 16 digits (15 for American Express) in length and the card must have the respective credit logo on it. A debit card without the logo (Visa, MasterCard, Discover or American Express) will not process.

Only the card numbers should be entered for processing. There must be no special characters in the card number or cardholder name fields.

Enter the card verification code as it appears on the card.

  • For Visa, MasterCard, and Discover cards, the code is 3 digits and is found on the back of the card.
  • For American Express, the code is 4 digits and is found on the front of the card.

Note: If the card being processed is from a saved source (e.g. ReBill recurring transactions) editing the saved information may not work. The saved information will need to be deleted and re-entered for the card to process correctly. This is true even if only one of the saved variables is incorrect.


If a card continues to present this error and the validity of the card number needs to be confirmed, perform a voice authorization to be sure.