A personal identification number (PIN) is a series of numerical digits that help safeguard your financial accounts. It is typically used in conjunction with taking money out of your bank or credit union account at the ATM or completing a transaction with your debit card or credit card at the point of sale (POS) system at a store.

Personal identification numbers (PINs) usually range from four to six digits and are generated by the issuing bank through a coding system that makes each PIN unique, or are chosen by the account holder themself.