BR-24: Invoice line net amount (BT-131) is required

ExampleEN 16931 (UBL)

An invoice built like a valid one, except for this:

<cac:InvoiceLine>
  <cbc:ID>1</cbc:ID>
  <cbc:InvoicedQuantity unitCode="H87">1</cbc:InvoicedQuantity>
  <cac:Item>
    <cbc:Name>Widget</cbc:Name>
    <cac:ClassifiedTaxCategory>
      <cbc:ID>S</cbc:ID>
      <cbc:Percent>19.00</cbc:Percent>
      <cac:TaxScheme>
        <cbc:ID>VAT</cbc:ID>
      </cac:TaxScheme>
    </cac:ClassifiedTaxCategory>
  </cac:Item>
  <cac:Price>
    <cbc:PriceAmount currencyID="EUR">100.00</cbc:PriceAmount>
  </cac:Price>
</cac:InvoiceLine>

The validator says: Invoice line net amount (BT-131) is required and the document does not contain it.

How to fix it

Add Invoice line net amount to the invoice.

Frequently asked questions

What does BR-24 mean?

Invoice line net amount (BT-131) is required. The rule runs under EN 16931 (UBL), Peppol BIS 3.0, and XRechnung 3.0 (UBL).

How do I fix BR-24?

Add Invoice line net amount to the invoice. In UBL the element is /Invoice/cac:InvoiceLine/cbc:LineExtensionAmount.