Validation rules

PEPPOL-EN16931-R055 — Peppol BIS rule

The invoice total VAT amount and its accounting-currency counterpart must have the same sign.

Rule: PEPPOL-EN16931-R055 — 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

Align the signs of the two tax totals.

PEPPOL-EN16931-R055 auf Deutsch — was bedeutet der Fehler?

Der Umsatzsteuergesamtbetrag und sein Gegenstück in der Buchungswährung müssen dasselbe Vorzeichen haben.

So beheben Sie den Fehler

Gleichen Sie die Vorzeichen der beiden Steuerbeträge an.

Related rules

PEPPOL-EN16931-R054 — When a tax accounting currency is used, exactly one additional tax total without subtotals must carry it.
PEPPOL-EN16931-R053 — Exactly one tax total with tax subtotals must be provided.
PEPPOL-EN16931-R061 — A direct-debit payment (means code 49/59) must carry a mandate reference (BT-89).
PEPPOL-EN16931-R046 — The item net price must equal the gross price minus the price allowance when a gross price is provided.
PEPPOL-EN16931-R044 — A charge on price level is not allowed — only allowances (indicator 'false').
PEPPOL-EN16931-R043 — An allowance/charge indicator must be exactly 'true' or 'false'.

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.