If the card-issuing bank identifies a possible fraudulent transaction, they will require customers to pass a 3D Secure Authentication. 3D Secure is an additional verification step to verify that you are the owner of the credit card. When 3D Secure Authentication is triggered, you will be redirected to an authentication page on your bank’s website where you enter a password associated with the card or a code sent to your phone.
If you cannot pass 3D authentication and think it is a mistake, you can contact us at onlinestore@swellpro.com for manual authentication by our stuff.