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PEPPOL-EN16931-R101BT-128
input
A line-level referenced document is not an invoice line object identifier
On an invoice line, `Additional referenced document` is admitted only with type code 130 — the invoice line object identifier (BT-128).
Only the issuer holds this value: Factlint reports it and never fabricates it. Test your invoice to find out whether it is affected.
Why this error happens
The location exists in CII syntax but EN 16931 gives it a single use. Attaching a file or a delivery note there produces a document the recipient will ignore: the data is written, it is not read.
How to fix it
Move the reference to document level, where EN 16931 expects it. Factlint does not move it: nothing says what it was meant for.