# BR-19 Seller tax representative postal address is required when the party is present

The Seller tax representative postal address (BG-12) shall be provided when the Seller (BG-4) has a Seller tax representative party (BG-11).

## Problem Description

> **ERROR**: EN 16931 core business rule (CEN)

## Context and Significance

This is a conditional EN 16931 core rule. The postal address is part of the identification of the tax representative and must be present as soon as a representative is declared. The error appears when an export fills the representative’s name and VAT identifier but not cac:PostalAddress. In CII, BG-12 is ram:SellerTaxRepresentativeTradeParty/ram:PostalTradeAddress.

## Solution

When a cac:TaxRepresentativeParty group is present, add its cac:PostalAddress with at least the country code.

- [Validate XML](/en/xrechnung-validator?source=resource&rule=BR-19)
- [Convert invoice](/en/pdf-to-xrechnung?source=resource&rule=BR-19)

## Valid Examples

- cac:TaxRepresentativeParty present with a cac:PostalAddress containing a country

## Invalid Examples

- cac:TaxRepresentativeParty is present but has no cac:PostalAddress

## Code Examples

### Valid XML
```
<cac:TaxRepresentativeParty>
  <cac:PartyName>
    <cbc:Name>VAT Rep Services Ltd</cbc:Name>
  </cac:PartyName>
  <cac:PostalAddress>
    <cac:Country>
      <cbc:IdentificationCode>DE</cbc:IdentificationCode>
    </cac:Country>
  </cac:PostalAddress>
</cac:TaxRepresentativeParty>
```

### Invalid XML
```
<cac:TaxRepresentativeParty>
  <cac:PartyName>
    <cbc:Name>VAT Rep Services Ltd</cbc:Name>
  </cac:PartyName>
</cac:TaxRepresentativeParty>
```

## Affected Fields

- [BG-12 Seller tax representative postal address](/resources/xrechnung/bt-69-tax-representative-country-code)
- [BG-11 Seller tax representative party](/resources/xrechnung/bt-62-seller-tax-representative-name)

## Related Rules

- [BR-18](/resources/kosit-validator-errors/br-18-tax-representative-name-required)
- [BR-20](/resources/kosit-validator-errors/br-20-tax-representative-country-code-required)

## Validation Tools

- [Official KoSIT Validator](https://github.com/itplr-kosit/validator): Run the official KoSIT validator with the XRechnung configuration to check EN 16931 and XRechnung rules.
- [Convert PDF to XRechnung](/pdf-to-xrechnung): Find validation errors during conversion and review each correction.

## Related Resources

- [Official Specification](https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)
- [All validation errors](/resources/kosit-validator-errors): Overview of the EN 16931, XRechnung and Peppol validation rules explained here.