UBL-DT-25: Leave the characterSetCode attribute out of the invoice

What it means

The rule searches the whole file for an attribute called characterSetCode. In UBL it can be added to an element that holds a file, such as an attachment, to say which character set the content uses. EN 16931 does not use it, so it should not appear anywhere in the invoice. The rule has no business term number because it is about how the XML is written, not about a field you fill in.

Why it matters

EN 16931 says you should leave the characterSetCode attribute out of UBL invoices and credit notes.

How to fix it

You normally do not set this attribute yourself. Your invoicing software adds it when it writes the file, so look for an export setting or a newer version, or ask the software supplier to stop writing it. If you build the XML yourself, search the file for characterSetCode and delete the attribute, typically from cbc:EmbeddedDocumentBinaryObject, then check the file again. It is worth fixing the next time you change your export, and sooner if a recipient asks for a file without warnings.

The rule as published

CharacterSetCode attribute should not be present

Where this rule applies