BR-27
A line's net price may not be negative. A minus belongs in the quantity or in a credit note, never in the price.
- Severity
- Error
- Applies to
- CII, UBL
- Rule set
- v2026-01-31
Official rule text
The Item net price (BT-146) shall NOT be negative.
Why does BR-27 happen?
Reversal rows and rebates are readily modelled as a negative price, because that works immediately in your own total. The norm provides other means for it.
How do you fix BR-27?
Model a rebate as an allowance on the line, or issue a credit note with invoice type 381. The price in cac:Price/cbc:PriceAmount stays positive.
In the XML
A UBL fragment. The CII path is named above — same change, different element names.
<cac:Price>
<cbc:PriceAmount currencyID="EUR">-100.00</cbc:PriceAmount>
</cac:Price><cac:Price>
<cbc:PriceAmount currencyID="EUR">100.00</cbc:PriceAmount>
</cac:Price>NormAPI provides technical validation, not tax or legal advice.