# XV-PL-37

Source: https://xmlvalid.com/rules/XV-PL-37

> KursWaluty on an invoice line is the exchange rate of an invoice in a foreign currency; this invoice is in PLN (FA(3) information sheet, KursWaluty).

- Level: error
- Rule sets: KSeF and FA(3) checks KSeF 2.0 invoice verification (9 April 2026), FA(3) information sheet (August 2026)
- Context: `/fa:Faktura/fa:Fa`
- Test: `not($pln) or not(fa:FaWiersz/fa:KursWaluty)`

Validate a document against these rules: https://xmlvalid.com/validate