# BR-06

> The invoice is missing the Seller name (BT-27). Provide the seller's registered name under cac:AccountingSupplierParty.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/br-06

## Official rule text

An Invoice shall contain the Seller name (BT-27).

## Why did my invoice fail BR-06?

The invoice must contain the Seller name (BT-27), the full legal or registered name of the party issuing the invoice and providing the goods or services. It is a core party identification field required for tax and commercial purposes. In UBL it is cac:AccountingSupplierParty/cac:Party/cac:PartyName/cbc:Name.

## Common causes

- The Seller PartyName/Name element is missing.
- Only a Seller trading/legal registration name is supplied but PartyName is empty.
- The name is placed under PartyLegalEntity/RegistrationName only, with PartyName omitted where required.
- Seller party block was populated with identifiers but no name.

## How do I fix it?

```
<cac:AccountingSupplierParty><cac:Party><cac:PartyName><cbc:Name>Example Seller Ltd</cbc:Name></cac:PartyName></cac:Party></cac:AccountingSupplierParty>
```