`iban` (bank account IBAN)
iban (bank account IBAN)
iban identifies the bank account. Bookkeeping uses it for validation and for matching workflows that rely on knowing which account transactions belong to, and it helps reviewers confirm payment instructions and spot suspicious changes.
Keeping IBAN explicit also supports integrations and exports where bank accounts must be identified unambiguously.
Example values: FI2112345600000785, FI5544443333222211.