Validation rules

PEPPOL-EN16931-R110

An invoice line period start date must lie within the document invoicing period.

Rule: PEPPOL-EN16931-R110 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-134 — Invoice line period start date
Field in your JSON: invoice.lines[*].period.start_date

How to fix it

Align invoice.lines[i].period.start_date with invoice.invoicing_period.

PEPPOL-EN16931-R110 auf Deutsch — was bedeutet der Fehler?

Das Startdatum eines Positionszeitraums muss im Abrechnungszeitraum liegen.

So beheben Sie den Fehler

Gleichen Sie invoice.lines[i].period.start_date mit invoice.invoicing_period ab.

Official sources

XRechnung specification (KoSIT / xeinkauf.de)
KoSIT validator on GitHub and the XRechnung validator configuration

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.