3D Secure is a tool that allows us to check that the credit / debit card used for payment is actually yours and on the contrary, to guarantee you that your card is not being used for fraud.
For this purpose, your Bank will previously have asked you to link your card to a mobile phone number. During the payment process, you should receive a 6 digits code. You will then need to enter this code on our site to process your payment and validate your order.