errorbusinessPeppol BIS 3.0

`PEPPOL-EN16931-R130`:Unit code of price base quantity MUST be same as invoiced quantity.

Fix: Invoice Navigator automatically fixes this issue by correcting the `cbc:InvoicedQuantity` element in your Invoice. Upload your invoice to fix this automatically.

The unit code of the price base quantity must match the unit code of the invoiced quantity. You cannot have different units between quantity and base quantity.

Severity

Fatal

Rule set

Peppol BIS 3.0

Country

All EU

Fix type

AUTO-FIX

Confidence

85%

Engine Classification

Ensure payable amount is non-negative

Confidence: 85% · Applied automatically in pipeline

What is PEPPOL-EN16931-R130?

PEPPOL-EN16931-R130 is a fatal validation rule defined in the Peppol BIS 3.0 specification. It validates the PayableAmount element 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:LegalMonetaryTotal/cbc:PayableAmount

Fix this error

Why This Error Matters

Invoice will be rejected by PEPPOL validation. Mismatched units prevent proper price calculation.

PEPPOL-EN16931-R130 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
·Rejected by PEPPOL Access Points
·Error returned: PEPPOL-EN16931-R130
·Specification: Peppol BIS 3.0

How to Fix It

Find the incorrectly formatted value

Check cbc:PayableAmount at //cac:LegalMonetaryTotal/cbc:PayableAmount. The current value does not match the required format.

Apply the correct format

Invoice Navigator automatically fixes this issue by correcting the `cbc:InvoicedQuantity` element in your Invoice.

Update your export settings

If this occurs consistently, check your invoicing software's locale and format settings for XML export. Re-validate to confirm PEPPOL-EN16931-R130 is resolved.

Before / After

Failing XML

<cac:InvoiceLine>
  <cbc:InvoicedQuantity>-100.00</cbc:InvoicedQuantity>
</cac:InvoiceLine>

Corrected XML

<cac:InvoiceLine>
  <cbc:InvoicedQuantity>100.00</cbc:InvoicedQuantity>
</cac:InvoiceLine>

Technical Reference

XPath//cac:LegalMonetaryTotal/cbc:PayableAmount

SpecPeppol BIS 3.0

Operationnormalize

StrategyEnsure payable amount is non-negative

Common Causes

·Different unit codes used for quantity and base quantity
·Base quantity unit not updated when quantity unit changed
·Template has mismatched default units
·ERP exports different units for these fields
·Manual entry inconsistency

Seeing this in production? The API handles PEPPOL-EN16931-R130 automatically. See the fix response →

Frequently Asked Questions

The unit code of the price base quantity must match the unit code of the invoiced quantity. You cannot have different units between quantity and base quantity.

Invoice Navigator automatically fixes this issue by correcting the `cbc:InvoicedQuantity` element in your Invoice. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Yes, PEPPOL-EN16931-R130 is a critical error that will cause invoice rejection. It must be fixed before submission.

Many instances of PEPPOL-EN16931-R130 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-R130:Unit code of price base quantity MUST be same as invoiced quantity.