errorPEPPOL_BIS

PEPPOL-EN16931-R080:Only one project reference is allowed on document level

Only one project reference is allowed at document level. If multiple projects are involved, they should be handled differently (e.g., separate invoices or line-level references).

Why This Error Matters

Invoice will be rejected by PEPPOL validation. Document level supports only one project reference.

Common Causes

  • Multiple project references added to invoice
  • ERP exports multiple project codes
  • Invoice covers multiple projects without consolidation
  • Template allows multiple project fields
  • Copy from source with multiple projects

Frequently Asked Questions

Only one project reference is allowed at document level. If multiple projects are involved, they should be handled differently (e.g., separate invoices or line-level references).
Only one project reference is allowed at document level. If multiple projects are involved, they should be handled differently (e.g., separate invoices or line-level references). You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, PEPPOL-EN16931-R080 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-R080 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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