Peppol BIS Billing 3.0 · rule

BR-CL-24

Layer en16931·Checked against Peppol BIS Billing 3.0 2026.5

What does BR-CL-24 mean? For Mime code in attribute use MIMEMediaType.

Why did my invoice fail BR-CL-24?

The MIME code of an attached document must be a valid MIME media type from the permitted set. This lets receivers know how to process the embedded attachment. In UBL it is the mimeCode attribute on cac:Attachment/cbc:EmbeddedDocumentBinaryObject; EN 16931 allows types such as application/pdf, image/png, image/jpeg, text/csv and the two Excel/ODS spreadsheet types.

Official rule text

For Mime code in attribute use MIMEMediaType.

Common causes

File extension ("pdf") instead of the full MIME type ("application/pdf")
A MIME type outside the allowed set (e.g. application/zip)
Mistyped type such as "application/x-pdf"

How do I fix it?

<cac:Attachment>
  <cbc:EmbeddedDocumentBinaryObject mimeCode="application/pdf" filename="invoice.pdf">JVBERi0xLjQ=</cbc:EmbeddedDocumentBinaryObject>
</cac:Attachment>

Check your invoice against this rule

Paste it into the live demo, or call POST /v1/validate. See the quickstart.