Clearance since 2019: the invoice is not legally issued until SdI accepts the file.
The facts
| Format | FatturaPA through SdI |
| Goes to | Agenzia delle Entrate, through the Sistema di Interscambio |
| Regime | Clearance — the authority authorises the document before it is valid |
| Invoice number | Stays ours: gap-free, sequential, yours to control |
| Seller tax ID | Partita IVA |
| Buyer tax ID | Partita IVA / Codice fiscale |
| Peppol EAS code | 0211 |
| Integration | Direct, no third-party provider needed |
The part that costs a day
The legal document is FatturaPA, not EN 16931 — so a valid Peppol UBL export does not stand in for an invoice here, no matter how clean it validates. The second surprise is the recipient: a buyer is addressed by a seven-character Codice Destinatario or a PEC address, and getting it wrong sends the invoice into the void rather than bouncing it back.
We issue gap-free, sequential numbers that reset on your schedule and are never reused — including for voided documents, which keep theirs. The authority takes the document as numbered.
Never extracted from the gross. The two formulas differ by a cent and the wrong one gets the file rejected. The leftover cent is declared as payment rounding (BT-114), where the standard puts it.
Straight talk
We do not hold your signing certificate, we do not file your periodic returns, and we are not your accountant.
Issuing here goes through a certified provider, with your own credentials. We build the document, validate it, send it and record what comes back.
Oltrano