henkilötunnuksiin

Henkilötunnus is a Finnish personal identification number system. It is a unique identifier assigned to every person registered in Finland. The system consists of a date of birth, a personal identifier that indicates the century of birth and sex, and a checksum. The date of birth is represented as DDMMYY. The personal identifier is a three-digit number, with the first digit indicating the century of birth (e.g., 0 for 1900s, 1 for 2000s) and the remaining two digits for a unique sequence within that century and sex. The checksum is a single character, usually a letter, calculated based on the preceding digits. This checksum ensures the validity of the personal identification number.

Henkilötunnus is used for a wide range of administrative purposes in Finland, including taxation, healthcare, social security, employment, and banking. It is essential for official identification and for distinguishing individuals in various societal functions. The Finnish Population Register Centre (Digi- ja väestötietovirasto) is responsible for issuing and managing personal identification numbers. Strict regulations govern the use and protection of henkilötunnus to prevent misuse and safeguard personal privacy. Access to and disclosure of personal identification numbers are restricted by law.