Ytunnus
Y-tunnus, commonly written Ytunnus, is the Finnish business identification number used to uniquely identify legally registered entities in Finland. It is assigned to companies, associations, foundations, and sole traders when they register with the authorities and is used in official communications, taxation, and public records.
The Y-tunnus is issued by the Finnish Patent and Registration Office (PRH) in cooperation with the Finnish
Typical format is seven digits, a hyphen, and a final check digit, for example 1234567-8. The Y-tunnus
Uses include taxation, value-added tax (VAT) registration, payroll and social security contributions, invoicing, and other dealings
Information about a registered entity and its Y-tunnus can be found in official Finnish business information