BR-27:The Item net price (BT-146) shall NOT be negative.
Fix: This requires user input to resolve. Provide the correct value for `cbc:PriceAmount` (BT-146). Upload your invoice to fix this automatically.
The Item net price (BT-146) shall NOT be negative.. Review the `cbc:PriceAmount` element.
Engine Classification
Auto-fix by taking the absolute value of the negative net price. BT-146 must be >= 0 per EN16931.
Confidence: 90% · Applied automatically in pipeline
What is BR-27?
BR-27 is a fatal validation rule defined in the EN 16931 specification. It validates the RegistrationName element under PartyName > Name or cac:PartyLegalEntity in the UBL invoice XML.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Target path: XPath: /Invoice/cac:AccountingSupplierParty/cac:Party/cac:PartyName/cbc:Name or cac:PartyLegalEntity/cbc:RegistrationName
Why This Error Matters
Invoice rejected. Negative prices are invalid - use credit notes or negative quantities for refunds.
BR-27 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Invoice Navigator can automatically correct this error in your pipeline. The fix is applied with full audit evidence, so your compliance trail remains intact.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: BR-27
- ·Specification: EN 16931
How to Fix It
Add trading name
In PartyName/Name for trading name
Or legal name
In PartyLegalEntity/RegistrationName for legal name
Best practice
Include both for clarity
Before / After
<cac:Price> <cbc:PriceAmount>-100.00</cbc:PriceAmount> </cac:Price>
<cac:Price> <cbc:PriceAmount>100.00</cbc:PriceAmount> </cac:Price>
Technical Reference
XPath: /Invoice/cac:AccountingSupplierParty/cac:Party/cac:PartyName/cbc:Name or cac:PartyLegalEntity/cbc:RegistrationNameCode Example
<cac:Party>
<cac:PartyName>
<cbc:Name>ABC Trading Ltd</cbc:Name>
</cac:PartyName>
<cac:PartyLegalEntity>
<cbc:RegistrationName>ABC Trading Limited</cbc:RegistrationName>
</cac:PartyLegalEntity>
</cac:Party>Common Causes
- ·Negative price entered in source system by mistake
- ·Credit adjustment applied at line level incorrectly
- ·Discount exceeds gross price creating negative net
- ·Currency conversion resulted in sign error
- ·Data import from legacy system with sign convention issue
Seeing this in production? The API handles BR-27 automatically. See the fix response →
Commonly Seen In
Frequently Asked Questions
The seller must have either a trading name or legal registration name.
This requires user input to resolve. Provide the correct value for `cbc:PriceAmount` (BT-146). Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, BR-27 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
BR-27 requires specific business data to resolve. Invoice Navigator detects the error and guides you through providing the needed information, then applies the fix with full audit documentation.
BR-27 is commonly seen in exports from All invoicing software. These software packages sometimes generate invoices that need adjustment to meet full compliance standards.
Related Errors
Related Content
Last updated: 15 April 2026
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