httpcdpthirdwebultravioletadao

api.sirenic.eu

European supplier and invoice verification for e-invoicing compliance in Belgium (mandate since 1 Jan 2026) and Poland (KSeF): registry identity, VAT check at VIES, Peppol reachability (BE), IBAN form + key, bank and, in Poland, the official White List: is the IBAN DECLARED by the taxpayer? Paying an undeclared account over 15,000 PLN costs the VAT deduction and joint liability. BE sole trader, PL taxpayer without KRS: no name or address (ecartes). Deterministic verdict, closed-list reasons.