# XV-PL-05

Source: https://xmlvalid.com/rules/XV-PL-05

> KSeF accepts an invoice with an attachment (Zalacznik) only from a seller who has registered the option in e-Urząd Skarbowy, and only in a batch session (KSeF 2.0, weryfikacja faktury).

- Level: warning
- 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:Zalacznik`
- Test: `true()`

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