PEPPOL-EN16931-CL001

Layer peppol·Checked against Peppol BIS Billing 3.0 2026.5

What does PEPPOL-EN16931-CL001 mean? Mime code must be according to subset of IANA code list.

Why did my invoice fail PEPPOL-EN16931-CL001?

The MIME code that declares the format of an embedded attachment must come from the subset of the IANA media-type list allowed by Peppol BIS 3.0. This guarantees receivers only get attachment types they can be expected to handle. The code is carried in the mimeCode attribute of cbc:EmbeddedDocumentBinaryObject.

Official rule text

Mime code must be according to subset of IANA code list.

Common causes

Using a MIME type outside the Peppol subset (e.g. application/zip or application/xml)
Typos such as 'pdf' or 'application/PDF' instead of application/pdf
Copying the file extension instead of a proper media type
Omitting the mimeCode attribute or leaving it empty

How do I fix it?

<cbc:EmbeddedDocumentBinaryObject mimeCode="application/pdf" filename="invoice.pdf">aHR0cHM...</cbc:EmbeddedDocumentBinaryObject>

Check your invoice against this rule

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