PEPPOL-COMMON-R047 — E-Invoice Validation Rule & Fix

Fixture ID: peppolBadItalianCodes · XPath: /ubl:Invoice/cac:AccountingCustomerParty/cac:Party/cac:PartyIdentification/cbc:ID

1. Why This Rule Triggers (Diagnostic Message)

The Buyer identifier (BT-46) is "IT01234567890" under scheme "0211", which identifies the Italian VAT number (Partita IVA). A value in that scheme must be "IT" followed by eleven digits whose last digit is a Luhn-style check digit, and this one is not. The Partita IVA check digit is computed by doubling every second digit and summing the results digit by digit, which catches the transposition that a plain length check does not. Note that a value not beginning with IT passes this rule untested — Peppol only checks what it can recognise. Peppol flags this one as a warning rather than a rejection, so the document will be delivered — but a wrong identifier is delivered to the wrong place, or to nowhere. This is a Peppol BIS Billing 3.0 profile rule: it applies because profile is "peppol-bis-3". It does not apply to the en16931, xrechnung-ubl or xrechnung-cii profiles, whose validators will accept the same document.

2. How to Fix PEPPOL-COMMON-R047

Correct buyer.identifier, or change its scheme identifier if the value belongs to a different register. A failing check digit or length almost always means a digit was transposed, dropped or added in transcription — compare it against the source register rather than re-typing it.

3. Valid Code / Payload Example

"identifier": { "schemeId": "0211", "value": "IT01234567897" }