Validation rules

BR-CO-11

The sum of document-level allowances (BT-107) does not equal the sum of the individual allowance amounts (BT-92).

Rule: BR-CO-11 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-107 — Sum of allowances on document level
Field in your JSON: invoice.allowances
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

normbill computes BT-107 from the allowances it serializes, so generated documents always balance.

How to fix it

Recompute cbc:AllowanceTotalAmount as the sum of all document-level allowance cbc:Amount values.

BR-CO-11 auf Deutsch — was bedeutet der Fehler?

Die Summe der Nachlässe auf Dokumentebene (BT-107) entspricht nicht der Summe der einzelnen Nachlassbeträge (BT-92).

So beheben Sie den Fehler

Berechnen Sie cbc:AllowanceTotalAmount als Summe aller Nachlass-cbc:Amount-Werte neu.

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.