In the Fishbrain Shop, we want to protect our customers from fraud and theft. As a result, sometimes we need to use different security measures at checkout. With 3D Secure, also displayed as a MasterCard SecureCode, a number of additional steps are added to the credit card process with the aim of authenticating the cardholder performing the transaction. The cardholder authenticates themselves to the issuing bank on the 3D Secure page by entering a One Time PIN or known password. The delivery of the PIN can be selected from the menu to be sent either by text or email.