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E-Invoice Validator

UBL

Universal Business Language — one of the two EN-16931 syntaxes.

UBL 2.1 is an OASIS specification and the syntax in which Peppol invoices and many XRechnung files are delivered.

A UBL invoice has the root element Invoice or CreditNote in the namespace urn:oasis:names:specification:ubl:schema:xsd.

In UBL, cbc:CustomizationID has the specification identifier BT-24.

Rules that often fail here

See also

Status: 12.10.2026