`PEPPOL-EN16931-R080`

Peppol BIS Billing 3 · validation rule

Peppol BIS Billing 3Error

More than one project reference (BT-11) is given on document level. Peppol allows only one cac:ProjectReference; the sender must remove the extra ones.

Field: document.project_reference (BT-11)
Rule set: Peppol BIS Billing 3
Rule-set version: Peppol BIS Billing 3.0 (rules master, Sep 2026) · in force since 2026-09-07 · Rule-set changelog
Who has to fix it: The sender

This is a property of the file you received, so it cannot be corrected on your side without changing the document — ask the supplier to reissue it.

Check your own invoice

Drop the file that failed. We parse it, run the official rule sets against it and list every finding with a fix — 20 invoices per day, no key, nothing stored.

Open the live demo

Same explanation over the API: GET /v1/rules/PEPPOL-EN16931-R080?lang=en