Validation rules

PEPPOL-EN16931-R042 — Peppol BIS rule

An allowance/charge base amount is present, so its percentage must be provided as well.

Rule: PEPPOL-EN16931-R042 — official EN 16931 / XRechnung rule
Severity: error
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Triggerable from your request JSON (generate & validate)

The request schema allows amount + base_amount without percent; the serializer then writes a base without a percentage, which this rule rejects.

How to fix it

Set the allowance/charge percent, or remove the base_amount.

PEPPOL-EN16931-R042 auf Deutsch — was bedeutet der Fehler?

Ein Grundbetrag ist angegeben, dann muss auch der Prozentsatz des Nachlasses/Zuschlags übermittelt werden.

So beheben Sie den Fehler

Setzen Sie percent — oder entfernen Sie base_amount.

Related rules

PEPPOL-EN16931-R041 — An allowance/charge percentage is present, so its base amount must be provided as well.
PEPPOL-EN16931-R043 — An allowance/charge indicator must be exactly 'true' or 'false'.
PEPPOL-EN16931-R040 — An allowance/charge amount must equal base amount × percentage / 100 when both base amount and percentage…
PEPPOL-EN16931-R044 — A charge on price level is not allowed — only allowances (indicator 'false').
PEPPOL-EN16931-R046 — The item net price must equal the gross price minus the price allowance when a gross price is provided.
PEPPOL-EN16931-R053 — Exactly one tax total with tax subtotals must be provided.

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.