# XV-PL-20

Source: https://xmlvalid.com/rules/XV-PL-20

> Zamowienie is for an advance invoice (ZAL) and its correction (KOR_ZAL), not for … (FA(3) information sheet, Zamowienie).

- 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: `$kind = ('ZAL', 'KOR_ZAL') or not(fa:Zamowienie)`

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