IDNtunnus

IDNtunnus is a Finnish term that translates to "identity code" or "identification number." It generally refers to a unique numerical identifier assigned to individuals or entities within a specific system or registry. The most common and widely recognized IDNtunnus in Finland is the personal identity code, known as henkilitunnus or henkilötunnus, often abbreviated as HETU. This code is used for a multitude of purposes, including accessing public services, employment, healthcare, and banking.

The henkilitunnus is a complex identifier that includes a person's date of birth, a unique three-digit number, and a check digit. Its structure ensures that each code is distinct, making it a reliable method for personal identification. Beyond individuals, other types of IDNtunnus exist. For example, businesses and organizations are assigned a business identity code, y-tunnus, for tax and legal purposes. Various other systems, such as those for social security benefits or specific licenses, may employ their own forms of identification numbers. The primary function of any IDNtunnus is to streamline administrative processes and ensure accurate record-keeping by providing a singular, unambiguous reference point.