PEPPOL-EN16931-CL006:Invoice period description code must be according to UNCL 2005 D.16B.
The invoice period description code must be from the UNCL 2005 D.16B list. This code describes what the invoicing period represents (delivery period, service period, etc.).
Engine Classification
Financial or legal field · Modification blocked by policy
What is PEPPOL-EN16931-CL006?
PEPPOL-EN16931-CL006 is a fatal validation rule defined in the PEPPOL_BIS specification. It checks whether invoice period description code must be according to uncl 2005 d.16b..
When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.
Why This Error Matters
Invoice will be rejected by PEPPOL validation. Period descriptions must use standard codes for clarity.
PEPPOL-EN16931-CL006 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
Validator Behavior
- ·Causes invoice rejection
- ·Rejected by PEPPOL Access Points
- ·Error returned: PEPPOL-EN16931-CL006
- ·Specification: PEPPOL_BIS
Technical Reference
Common Causes
- ·Invalid period description code
- ·Using wrong code list for period type
- ·Custom description code used
- ·Typo in period code
- ·Old version of code used
Seeing this in production? The API handles PEPPOL-EN16931-CL006 automatically. See the fix response →
Related Content
Last updated: 3 March 2026
Detect PEPPOL-EN16931-CL006 Before Submission
This error involves a financial or legal field that cannot be auto-modified. The compliance engine flags it immediately with a clear diagnosis so your team can fix it at the source.