FA(2)

KSeF structured-invoice schema, Poland.

Definition

FA(2) defines the mandatory XSD structure of an e-invoice submitted to KSeF: the Naglowek header, the Podmiot1/Podmiot2 parties (identified by NIP), the Fa invoice lines and an extension area. Any invoice sent to the system must validate against this schema or it is rejected; FA(2) is superseded by FA(3) when the 2026 mandate takes effect.

Origin

FA(2) schema published by the Ministerstwo Finansów (Polish Ministry of Finance) on the KSeF portal / Central Repository of Electronic Document Templates (CRWDE), ePUAP.

Example in context

<Faktura><Naglowek><KodFormularza kodSystemowy="FA (2)">FA</KodFormularza><WariantFormularza>2</WariantFormularza></Naglowek><Podmiot1>...</Podmiot1></Faktura>

Related terms

• KSeF — system that receives and validates FA(2).
• FA(3) — successor schema for the 2026 mandate.
• Numer KSeF — identifier assigned after FA(2) validation.