E-invoice / Rules / BR-52

E-invoice rule EN 16931 schematron

BR-52: Every supporting document (BG-24)

Every supporting document (BG-24) needs a reference (BT-122) in cbc:ID.

Original wording of the rule

[BR-52]-Each Additional supporting document (BG-24) shall contain a Supporting document reference (BT-122).

Source of the quotation: EN 16931 schematron (ConnectingEurope/eInvoicing-EN16931, licence EUPL 1.2)

How to fix it

1. Open the XML file and find the element cac:AdditionalDocumentReference/cbc:ID.
2. Add or correct the element the way the wording of the rule above asks for.
3. Save the file and check it again with our checker. It runs in your browser, the file is never uploaded.

A correct UBL 2.1 snippet

<cac:AdditionalDocumentReference
    xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
    xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
  <cbc:ID>2026-0142</cbc:ID>
</cac:AdditionalDocumentReference>

The snippet is only the part of the document the rule is about. Put it in the right place inside your invoice; the namespaces are written here only so that the snippet reads on its own.

When it is reported

Profile: EN 16931, Peppol BIS Billing 3.0, XRechnung 3.x

How we rate it: error

UBL elements: cbc:ID

Where we point in the file: /Invoice/cac:AdditionalDocumentReference[1]

Related rules

• BR-50 The payment account identifier (BT-84) is empty
• BR-51 The payment card number (BT-87) is longer than
• BR-53 If the VAT accounting currency code is present
• BR-54 An item attribute (BG-32) needs both a name (BT-160, cbc:Name)
• BR-55 A reference to a preceding invoice (BG-3) needs that invoice number

Our check is not complete: we do not check the XSD schema and we do not implement every rule, and a file that passes says nothing about whether the buyer or the Peppol network will accept it. Licences for the quoted wordings are listed in our sources.