EN 16931 e-invoice linter with 37 rules and 26 XML snippets for Peppol BIS 3.0, XRechnung and Factur-X

Catches the EN 16931 mistakes an AI assistant makes: wrong CustomizationID, 01/09/2026 dates, unitCode="pcs", amounts with no currencyID. 37 rules, 26 snippets, offline.

A real invoice, written the way a chat assistant writes them. The findings below are live — edit the XML and they change. Paste your own over it.

<?xml version="1.0" encoding="UTF-8"?>
<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
         xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
         xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
  <cbc:UBLVersionID>2.0</cbc:UBLVersionID>
  <cbc:CustomizationID>urn:cen.eu:en16931:2017</cbc:CustomizationID>
  <cbc:ProfileID>urn:fdc:peppol.eu:2017:poacc:billing:3.0</cbc:ProfileID>
  <cbc:ID>INV-2026-0001</cbc:ID>
  <cbc:IssueDate>01/09/2026</cbc:IssueDate>
  <cbc:DueDate>2026-10-07T00:00:00</cbc:DueDate>
  <cbc:InvoiceTypeCode>INVOICE</cbc:InvoiceTypeCode>
  <cbc:DocumentCurrencyCode>eur</cbc:DocumentCurrencyCode>
  <cbc:BuyerReference>TODO</cbc:BuyerReference>
  <cac:AccountingSupplierParty>
    <cac:Party>
      <cbc:EndpointID>5790000435975</cbc:EndpointID>
      <cac:PartyName><cbc:Name>Seller SARL</cbc:Name></cac:PartyName>
      <cac:PostalAddress>
        <cbc:CityName>Paris</cbc:CityName>
        <cac:Country><cbc:IdentificationCode>fr</cbc:IdentificationCode></cac:Country>
      </cac:PostalAddress>
      <cac:PartyTaxScheme>
        <cbc:CompanyID>DE123456789</cbc:CompanyID>
        <cac:TaxScheme><cbc:ID>vat</cbc:ID></cac:TaxScheme>
      </cac:PartyTaxScheme>
    </cac:Party>
  </cac:AccountingSupplierParty>
  <cac:PaymentMeans>
    <cbc:PaymentMeansCode>SEPA</cbc:PaymentMeansCode>
    <cac:PayeeFinancialAccount>
      <cbc:ID>FR76 3000 6000 0112 3456 7890 189</cbc:ID>
    </cac:PayeeFinancialAccount>
  </cac:PaymentMeans>
  <cac:TaxTotal>
    <cbc:TaxAmount currencyID="EUR">200.005</cbc:TaxAmount>
    <cac:TaxSubtotal>
      <cac:TaxCategory>
        <cbc:ID>Standard</cbc:ID>
        <cbc:Percent>20%</cbc:Percent>
        <cbc:TaxExemptionReasonCode>REVERSE_CHARGE</cbc:TaxExemptionReasonCode>
      </cac:TaxCategory>
    </cac:TaxSubtotal>
  </cac:TaxTotal>
  <cac:LegalMonetaryTotal>
    <cbc:PayableAmount>1200,00</cbc:PayableAmount>
  </cac:LegalMonetaryTotal>
  <cac:InvoiceLine>
    <cbc:ID></cbc:ID>
    <cbc:InvoicedQuantity unitCode="pcs">10</cbc:InvoicedQuantity>
    <cac:Item><cbc:Name>Consulting</cbc:Name></cac:Item>
  </cac:InvoiceLine>
</Invoice>

Every finding above is free, and always will be.

The licence is for a different job: checking every invoice fixture in a repository in one pass, failing a CI build when one stops being valid, and writing the report to a file. $49 once, per developer. 7-day refund, no questions.

Get the workspace + CI licence — $49

Get the complete version $29

This page is the working piece. The full pack has everything below.

Catches the EN 16931 mistakes an AI assistant makes: wrong CustomizationID, 01/09/2026 dates, unitCode="pcs", amounts with no currencyID. 37 rules, 26 snippets, offline.

EDI and ERP integration contractors in the EU bill EUR 60-90 an hour; one rejected-invoice debugging round costs more than this extension.

Buy the full version — $29

Want the full version?

Enter your email and we send the download link.

EN DE JA ES PT

EN 16931 e-invoice linter with 37 rules and 26 XML snippets for Peppol BIS 3.0, XRechnung and Factur-X

Every finding above is free, and always will be.

Get the complete version $29

More from ReadyStack

Find a tool