# BR-06

Quoted from a public specification. This page is not a validator, and it is not tax, legal, or accounting advice.

- Country: EU
- Syntax: UBL
- Severity: fatal
- Statement language: en
- Last verified: 2026-10-18

## Official statement

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

Source: https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/BR-06/

Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL

Severity note: fatal, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.

## Plain-language reading

An invoice must contain the seller name (BT-27). The message says "shall contain the Seller name", not "shall have". The published test checks that the seller party legal entity registration name is not blank.

## What to change

Fill the seller party legal entity registration name (BT-27).

## Illustration

Illustration of the condition in the official statement. Not an example published by the source.

**Fails the stated condition.** The seller party legal entity registration name is missing or blank.

**Passes the stated condition.** That registration name contains a non-empty seller name.

## Published context and test

Copied from the source. Not reimplemented on this page.

```
/ubl:Invoice | /cn:CreditNote
```

```
normalize-space(cac:AccountingSupplierParty/cac:Party/cac:PartyLegalEntity/cbc:RegistrationName) != ''
```

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