To prevent fraud, what does MasterCard require during transactions?

MasterCard requires the Card Verification Code (CVC) during transactions as a security measure to prevent fraud. The CVC is a three-digit code located on the back of credit or debit cards (four digits on the front of American Express cards) that serves as an additional layer of authentication, ensuring that the person making the transaction possesses the physical card. By requiring the CVC, MasterCard aims to confirm the legitimacy of the cardholder, particularly in card-not-present (CNP) transactions, such as online purchases where the physical card is not presented.

While entering the card number is essential for processing a transaction, it does not provide the same level of security against unauthorized use as the CVC does. Biometric identification, although increasingly popular, is not a standard requirement for all transactions and can vary by merchant and the technology they employ. Similarly, sending a verification email may enhance security but is not a requirement set by MasterCard for every transaction. Thus, the CVC serves as a critical component in safeguarding against potential fraud in payment processing.