UBL-CR-589: Catalogue document references are not used on invoice lines

What it means

The rule looks at the item on every invoice line (or credit note line) in a UBL file. It warns when the item contains a cac:CatalogueDocumentReference block, a pointer to the catalogue the item comes from. EN 16931 has no catalogue reference on a line. It does have a contract reference (BT-12) and a purchase order number (BT-13) for the whole invoice, and a purchase order line reference (BT-132) on a line.

Why it matters

EN 16931 does not use catalogue document reference blocks within a line's item.

How to fix it

Check whether your invoicing software exports a catalogue reference for each product, and adjust the export mapping to omit it. If the buyer asked for the catalogue reference, put it in the line note (BT-127), not the purchase order number field. If you build the XML yourself, delete cac:CatalogueDocumentReference from cac:InvoiceLine/cac:Item (cac:CreditNoteLine in a credit note).

The rule as published

A UBL invoice should not include the InvoiceLine Item CatalogueDocumentReference

Where this rule applies