E-Invoice ValidatorPEPPOL-EN16931-R003
MistakeUBLCII
What that means
Neither buyer reference (BT-10) nor order reference (BT-13) is given.
Here's how to fix it
Add BT-10 or BT-13; in the B2G area, BT-10 is the route ID.
Official rules text
A buyer reference or purchase order reference MUST be provided.
Rules and regulations
- Peppol BIS Billing 3.0 (UBL) (v3.0.20)
- Peppol BIS Billing 3.0 (CII) (v3.0.20)
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- Official EN 16931 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.