# OVT-tunnus

Finnish electronic invoicing identifier (12–17 digits), Peppol EAS scheme 0037; built from the Finnish business ID (Y-tunnus).

## Definition

Finnish electronic invoicing identifier (12–17 digits), Peppol EAS scheme 0037; built from the Finnish business ID (Y-tunnus).

## Explanation

Format: leading 0037 + Y-tunnus (without hyphen) + optional 5-digit operator-specific suffix; widely used in Finnish bank-driven invoicing alongside Finvoice.

Used as the BuyerReference (BT-10) on legacy Finvoice flows and as the Peppol Participant ID on EN 16931 / Peppol BIS routes.

## Related resources

- [Finland e-invoicing guide](/resources/countries/finland)

## Related terms

- [EAS (Electronic Address Scheme)](/resources/glossary/eas): EN 16931 code list (CEF EAS) that says which identifier scheme — VAT-ID, GLN, OIN, etc. — is used for an electronic address.
- [Finvoice](/resources/glossary/finvoice): Finnish bank-driven e-invoicing format defined by Finance Finland; widely used in B2B and aligned with EN 16931 from version 3.0.
- [Participant ID](/resources/glossary/participant-id): Identifier used in PEPPOL to address a sender/receiver (e.g., with a scheme).