Validation rules

PEPPOL-EN16931-R008 — Peppol BIS rule

The document must not contain empty elements.

Rule: PEPPOL-EN16931-R008 — official EN 16931 / XRechnung rule
Severity: error
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

The request schema requires non-empty strings and the serializer omits absent fields, so generated documents never contain empty elements.

How to fix it

Remove empty XML elements — an absent field is expressed by omitting its element entirely.

PEPPOL-EN16931-R008 auf Deutsch — was bedeutet der Fehler?

Das Dokument darf keine leeren XML-Elemente enthalten.

So beheben Sie den Fehler

Entfernen Sie leere Elemente — ein nicht vorhandenes Feld wird durch Weglassen des Elements ausgedrückt.

Related rules

PEPPOL-EN16931-R010 — The buyer electronic address (BT-49) must be provided.
PEPPOL-EN16931-R005 — The VAT accounting currency (BT-6) must differ from the invoice currency (BT-5) when provided.
PEPPOL-EN16931-R001 — The business process (BT-23) 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.