Root Cause

• Invalid or unsupported payment method: The selected payment method is not accepted by the merchant or payment gateway.
• Expired or deactivated payment method: The payment method is no longer valid or has been deactivated by the issuer.
• Incorrect payment details: The payment method information provided is incomplete or incorrect.
• Payment method blocked: The issuer or payment gateway has blocked the payment method due to security, risk, or policy reasons.

Troubleshooting and Solutions

Ask the customer to

• Verify and re-enter valid payment details.
• Use a different and supported payment method to complete the transaction.
• Contact the payment method provider or bank to check for any restrictions or deactivation.
• Remove and re-add the payment method if previously saved details are outdated.
• Retry the transaction after ensuring the payment method is active and valid.