Validation rules

UBL-CR-006

cbc:IssueTime is present. The EN 16931 core model works with dates only (BT-2) — a time of day is not part of it.

Rule: UBL-CR-006 — official EN 16931 / XRechnung rule
Severity: warning
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

normbill's serializer writes invoice.issue_date as cbc:IssueDate only, never a time.

How to fix it

Remove cbc:IssueTime; keep the date in cbc:IssueDate.

UBL-CR-006 auf Deutsch — was bedeutet der Fehler?

Der KoSIT-Validator meldet eine Warnung, weil cbc:IssueTime vorhanden ist. Das Kernmodell der EN 16931 arbeitet nur mit Datumsangaben (BT-2) — eine Uhrzeit ist nicht vorgesehen.

So beheben Sie den Fehler

Entfernen Sie cbc:IssueTime; das Datum gehört in cbc:IssueDate.

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.