Card Number Validation

Sometimes, cardholders might enter a cancelled, non-issued or invalid card number in the Payment Form. This payment information is validated on the backend when you submit the sale request.

Credit card numbers are validated by:

• Getting the card token.

• Using card number field values, excluding non-numeric characters.

• Passing the remaining digits through the Luhn algorithm.

Note: Passing the remaining digits of the credit card through the Luhn algorithm does not prove the validation but helps prevent typing errors.