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E-Invoice Validator

BR-01

MistakeUBLCII

What that means

The invoice is missing the specification identifier (BT-24). Without it, it is not clear which rules should be checked against.

Here's how to fix it

Fill field BT-24, e.g. E.g. urn:cen.eu:en16931:2017 for EN 16931 or the recipient's XRechnung/Peppol identifier.

Official rules text

[BR-01]-An Invoice shall have a Specification identifier (BT-24).

Rules and regulations

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Official rule sets up to date: EN 16931 1.3.17 · Peppol BIS 3.0.20 · XRechnung 3.0.2 (KoSIT 2.6.0). Last checked against the sources on 12.10.2026.