Error code BR-28
What error BR-28 means
BR-28 is a rule of EN 16931. If your invoice breaks it, the official rule text below says what is expected. The fields it names are listed under it.
This page shows the official rule only; a plain-language explanation hasn't been written yet.
The official rule
“The Item gross price (BT-148) shall NOT be negative.”
Official text, in the language the rule set publishes it in.
Fields named: BT-148