What causes the PEPPOL-EN16931-R009 error?

Seller party must have name specified.

How do I fix PEPPOL-EN16931-R009?

Update the `@unitCode` element to use a value from the allowed code list. Check the `cac:InvoiceLine/cbc:InvoicedQuantity/@unitCode` element. This error involves a protected field — Invoice Navigator flags it in your pipeline so your team can correct it at the source.

Is PEPPOL-EN16931-R009 a critical error?

Yes, PEPPOL-EN16931-R009 is a critical error that must be fixed.

Error codes · Peppol BIS 3.0

IN-UNIT-CODESPartly

Unit of measure codes validation

This is the rejection, word for word: „[IN-UNIT-CODES] Unit codes should be from UN/ECE Recommendation 20“

What to have readyThe correct figures from your bookkeeping; we show you which field is affected.

What we doUpdate the `@unitCode` element to use a value from the allowed code list. Check the `cac:InvoiceLine/cbc:InvoicedQuantity/@unitCode` element.

Choose the rejected invoiceor drop it here

XRechnung XML or ZUGFeRD PDF. Checking is free · corrected file €1.90 · the first every 30 days is free · no sign-up.

If you enter it yourself in your invoicing software

Before

<cbc:InvoicedQuantity>
  <@unitCode>INVALID_CODE</@unitCode>
</cbc:InvoicedQuantity>

After

<cbc:InvoicedQuantity>
  <@unitCode>VALID_CODE</@unitCode>
</cbc:InvoicedQuantity>

What the finding looks likeExample

FindingNeeds your check · IN-UNIT-CODES

Location/Invoice/cac:AccountingSupplierParty/cac:Party/cac:PartyName/cbc:Name

From youThe correct figures

ThenChecked again

ProofSHA-256 and /verify link after the check

Often appears together with

PEPPOL-EN16931-R010Buyer electronic address (EndpointID) MUST be provided