MasterCard pin code refers to the identification password of personal credit card, which plays a role in improving the security of credit card payment and preventing credit card information from leaking.

MasterCard pin codes are generally three or four digits printed on credit cards, and the printing positions of different types of credit cards are generally different.

Poss terminals in shopping malls or consumer places will use pin codes to detect transactions when conducting credit card transactions with customers. When the user is required to enter the pin code, the user can enter the transaction password of the card for transaction.