Description

The payment failed because the card number is invalid. This error occurs when the customer enters an incorrect, incomplete, or improperly formatted card number, uses an unsupported card type, or submits a test or placeholder number.

Recommended Customer Message

Your payment could not be processed because the card number is invalid. Please verify your card number and try again.

Root Cause

• Incorrect card number: The customer mistyped or entered an incomplete card number.
• Invalid card format: The provided number does not meet the required format or fails validation checks such as the Luhn algorithm.
• Unsupported card type: The entered card number belongs to a card type not supported by the payment gateway.
• Test or placeholder number: A dummy or test card number was mistakenly used in a live transaction environment.

Troubleshooting and Solutions

• Ask the customer to carefully re-verify and enter the correct card number.
• Ensure the card number matches the expected format and length for the card type being used.
• Recommend using a different payment card if the issue persists.
• Suggest contacting the bank if the customer continues to experience difficulties with the valid card number.
• Implement real-time validation on the payment form to help prevent incorrect or invalid card number submissions.