A Personal Identification Number (PIN) is a numerical code assigned to a debit card. It serves as a security measure to authenticate the cardholder during transactions. For example, when making a purchase at a point-of-sale terminal or withdrawing cash from an Automated Teller Machine (ATM), the cardholder enters this confidential code to verify their identity and authorize the transaction.
The use of a PIN enhances security by preventing unauthorized access to funds should the debit card be lost or stolen. Its implementation represents a significant advancement in fraud prevention within the financial industry. Historically, debit card transactions relied primarily on signatures, a method less secure and more susceptible to forgery. The introduction of PINs made transactions more secure, offering greater protection for both cardholders and financial institutions.