BR-CO-26:The invoice is missing seller identification. At least one of: Seller...
Fix: The invoice is missing seller identification. At least one of: Seller Identifier (BT-29), Legal Registration ID (BT-30), or VAT Identifier (BT-31) must be present. Provide the required value in the free validator.
The invoice is missing seller identification. At least one of: Seller Identifier (BT-29), Legal Registration ID (BT-30), or VAT Identifier (BT-31) must be present.
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Seller Identifier (BT-29), Legal Registration ID (BT-30), VAT Identifier (BT-31)
What is BR-CO-26?
BR-CO-26 is a fatal validation rule defined in the EN 16931 specification.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Why This Error Matters
Invoice rejected. Buyers need to identify the seller for payment routing and tax verification.
BR-CO-26 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: BR-CO-26
- ·Specification: EN 16931
How to Fix It
Identify the missing data
The invoice is missing seller identification. At least one of: Seller Identifier (BT-29), Legal Registration ID (BT-30), or VAT Identifier (BT-31) must be present.
Provide the required value
The invoice is missing seller identification. At least one of: Seller Identifier (BT-29), Legal Registration ID (BT-30), or VAT Identifier (BT-31) must be present.
Re-validate your invoice
Upload the corrected invoice to confirm BR-CO-26 is resolved.
Before / After
<cac:PartyIdentification> <cbc:ID><!-- invalid or missing value --></cbc:ID> </cac:PartyIdentification>
<cac:PartyIdentification> <cbc:ID>correct-value</cbc:ID> </cac:PartyIdentification>
Technical Reference
Common Causes
- ·Seller has no identifier for buyer matching
- ·Missing BT-29 (Seller ID), BT-30 (Legal reg), and BT-31 (VAT)
- ·Seller party has no identification elements
- ·Company setup incomplete - no identifiers configured
- ·Export template missing seller identifier mappings
Seeing this in production? The API handles BR-CO-26 automatically. See the fix response →
Frequently Asked Questions
The invoice is missing seller identification. At least one of: Seller Identifier (BT-29), Legal Registration ID (BT-30), or VAT Identifier (BT-31) must be present.
The invoice is missing seller identification. At least one of: Seller Identifier (BT-29), Legal Registration ID (BT-30), or VAT Identifier (BT-31) must be present. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, BR-CO-26 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of BR-CO-26 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.
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Last updated: 14 April 2026
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