Validation rules

PEPPOL-EN16931-R005 — Peppol BIS rule

The VAT accounting currency (BT-6) must differ from the invoice currency (BT-5) when provided.

Rule: PEPPOL-EN16931-R005 — official EN 16931 / XRechnung rule
Severity: error
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Not expressible through the normbill invoice model — documented for completeness

The normbill invoice model has no VAT accounting currency (BT-6).

How to fix it

Remove cbc:TaxCurrencyCode, or set a currency different from the invoice currency.

PEPPOL-EN16931-R005 auf Deutsch — was bedeutet der Fehler?

Die Umsatzsteuer-Währung (BT-6) muss sich von der Rechnungswährung (BT-5) unterscheiden, wenn sie angegeben ist.

So beheben Sie den Fehler

Entfernen Sie cbc:TaxCurrencyCode — oder setzen Sie eine von der Rechnungswährung abweichende Währung.

Related rules

PEPPOL-EN16931-R008 — The document must not contain empty elements.
PEPPOL-EN16931-R001 — The business process (BT-23) must be provided.
PEPPOL-EN16931-R010 — The buyer electronic address (BT-49) must be provided.
PEPPOL-EN16931-R020 — The seller electronic address (BT-34) must be provided.
PEPPOL-EN16931-R040 — An allowance/charge amount must equal base amount × percentage / 100 when both base amount and percentage…
PEPPOL-EN16931-R041 — An allowance/charge percentage is present, so its base amount must be provided as well.

Official sources

Every 422 from the API lists the rule id, the path in your request JSON, a plain-language message and a suggested fix — see the docs overview for the report format.

Or try it live: drop any XRechnung XML on the free validator — same KoSIT-backed report, no account.