errorPEPPOL_BIS

PEPPOL-EN16931-R003:A buyer reference or purchase order reference MUST be provided.

Either a buyer reference or purchase order reference must be provided. This helps the buyer identify and match the invoice to their internal records or purchase order.

Why This Error Matters

Invoice will be rejected by PEPPOL validation. Buyer needs reference information to process and approve the invoice.

Common Causes

  • Neither buyer reference nor PO number provided
  • Buyer did not supply reference when ordering
  • ERP does not capture buyer references
  • Free-form sale without PO
  • Reference fields not mapped in export

Frequently Asked Questions

Either a buyer reference or purchase order reference must be provided. This helps the buyer identify and match the invoice to their internal records or purchase order.
Either a buyer reference or purchase order reference must be provided. This helps the buyer identify and match the invoice to their internal records or purchase order. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, PEPPOL-EN16931-R003 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted.
Many instances of PEPPOL-EN16931-R003 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues.

Last updated: 16 January 2026

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