The 3D Secure technology is designed to reduce the possibility of fraudulent card use by authenticating the cardholder at the actual time of the transaction. This protects you against unauthorised use of the card. Verified by Visa (VbV) and Mastercard SecureCode authentications require the cardholder to register your card on the card issuer’s website to take advantage of this service. If you’re registered at the time of payment, a screen from your card issuer will prompt you to enter the unique personal code that you have registered with them. The card issuer then validates your personal code and approves the transaction. If you’re not registered, but the bank that issued your Visa card supports VbV or the bank that issued your Mastercard supports SecureCode, you may be prompted to enter your password or to sign up for VbV or SecureCode as you check out.