When I proceed with the payment by credit card, it appears a message saying that my credit card is not a valid one

This error message can be due to different reasons:

  • Authentication failed: you are not entering correctly the code provided by your bank.
  • Validation error: the data of the credit card entered are not correct.
  • Your credit card is not valid for this payment.

Contact the bank where you have the account associated to your card, they could inform you and give you a solution.