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).
warning: reported, still valid
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element