errorbusinessEN 16931

`PEPPOL-EN16931-R110`:Start date of line period MUST be within invoice period.

Fix: Invoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements (PEPPOL-EN16931-R110). Upload your invoice to fix this automatically.

The start date of a line period must fall within the invoice period. Line periods cannot extend before the overall invoice period begins.

Severity

Fatal

Rule set

EN 16931

Country

All EU

Fix type

AUTO-FIX

Confidence

80%

Engine Classification

Adjust invoice line period start date to fall within invoice period

Confidence: 80% · Applied automatically in pipeline

What is PEPPOL-EN16931-R110?

PEPPOL-EN16931-R110 is a fatal validation rule defined in the EN 16931 specification. It validates the StartDate element under InvoicePeriod in the UBL invoice XML.

When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.

Target path: //cac:InvoiceLine/cac:InvoicePeriod/cbc:StartDate

Fix this error

Why This Error Matters

Invoice will be rejected by PEPPOL validation. Line periods must be contained within the invoice billing period.

PEPPOL-EN16931-R110 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.

Invoice Navigator can automatically correct this error in your pipeline. The fix is applied with full audit evidence, so your compliance trail remains intact.

Validator Behavior

·Causes invoice rejection
·Error returned: PEPPOL-EN16931-R110
·Specification: EN 16931

How to Fix It

Locate the field

Check cbc:StartDate at //cac:InvoiceLine/cac:InvoicePeriod/cbc:StartDate. The current value does not meet the rule requirements for PEPPOL-EN16931-R110.

Set the correct value

Invoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements (PEPPOL-EN16931-R110).

Re-validate your invoice

Upload the corrected invoice to confirm PEPPOL-EN16931-R110 is resolved.

Before / After

Failing XML

<Invoice>
  <!-- Issue: Start date of line period MUST be within invoice period. -->
</Invoice>

Corrected XML

<Invoice>
  <!-- Issue resolved per EN 16931 -->
</Invoice>

Technical Reference

XPath//cac:InvoiceLine/cac:InvoicePeriod/cbc:StartDate

SpecEN 16931

Operationset_value

StrategyAdjust invoice line period start date to fall within invoice period

Common Causes

·Line period starts before invoice period
·Invoice period updated without checking line periods
·Line added from different billing cycle
·Date entry error on line period
·Copy from previous invoice without updating dates

Seeing this in production? The API handles PEPPOL-EN16931-R110 automatically. See the fix response →

Frequently Asked Questions

The start date of a line period must fall within the invoice period. Line periods cannot extend before the overall invoice period begins.

Invoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements (PEPPOL-EN16931-R110). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Yes, PEPPOL-EN16931-R110 is a critical error that will cause invoice rejection. It must be fixed before submission.

Many instances of PEPPOL-EN16931-R110 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.

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PEPPOL-EN16931-R110:Start date of line period MUST be within invoice period.