Finland: Updated FATCA and CRS technical guidance
New Ilmoitin validation rules for account numbers, TINs, name types, and nationality reporting.
Finland’s tax administration updated its FATCA technical guidance (v3.6), including:
- Section 7, “List of Automated Checks Made by Ilmoitin,” now includes new validation processes:
- AccountReport/AccountNumber/@AcctNumberType: If AcctNumberType is OECD601, the account number must be in IBAN format; if OECD603, it must be in ISIN format.
- AccountHolder/Individual/TIN and SubstantialOwner/Individual/TIN: If an FTIN is reported, the corresponding U.S. TIN must also be provided.
It also updated its CRS technical guidance (v3.2), adding:
- Section 7, “Checks Made by Ilmoitin.fi,” now includes several validation enhancements:
- //Name/@nameType: The optional nameType field may now only use OECD207.
- AccountHolder/Individual/TIN and ControllingPerson/Individual/TIN: The TIN element is limited to 100 characters.
- ControllingPerson/Individual/Nationality and AccountHolder/Individual/Nationality: The Nationality element is prohibited.
Read a July 2026 report prepared by the KPMG member firm in Finland