letter service, a security verification service jointly launched by MasterCard of some banks to improve credit cards, ensure the security of customers' online payment and safeguard customers' interests.

after opening this service, you can enjoy the Visa/MasterCard verification service when you pay online on overseas websites (the deduction account is an overseas account). Through the verification of personalized information, you can ensure the authenticity of the shopping website, and through the re-verification of the dynamic transaction password, you can fully guarantee the safety of online shopping.

Extended information:

According to the relevant regulations of Visa and MasterCard, when using a credit card with the logo of Visa or MasterCard, this verification service must be enabled when making online foreign currency payments on overseas websites to protect the safety of users' card use.

Some issuers do not support 3D authentication; To apply for 3D authentication service, you need to apply to the issuing bank first; 3D verification can only work when shopping online; The 3D verification service is free.

Reference: Baidu Encyclopedia -3D Verification