# BT-39 Seller country subdivision

State, province, or regional subdivision of the seller address.

## Quick answer

State, province, or regional subdivision of the seller address.

> **Seller details**: Who issued the invoice and how the recipient can identify that business reliably.

## In plain language

State, province, or regional subdivision of the seller address.

State, province, or regional subdivision of the seller address.

This is useful where regional information matters for tax, routing, or formal postal addressing.

## What you usually enter here

Region or province name

Typical valid values include: Bayern

Optional according to EN 16931-1.

## What goes wrong often

Avoid values like:

## Examples in context

This is useful where regional information matters for tax, routing, or formal postal addressing.

Optional according to EN 16931-1.

## Valid Examples

- Bayern

## Related Fields

This is useful where regional information matters for tax, routing, or formal postal addressing.

- [BT-37 Seller City](/resources/xrechnung/bt-37-seller-city)
- [BT-38 Seller Post Code](/resources/xrechnung/bt-38-seller-post-code)
- [BT-40 Seller Country Code](/resources/xrechnung/bt-40-seller-country-code)

## XML mapping and field facts

Open the technical reference if you need XML paths, validator rule codes, legal wording, or schema-specific mapping details.

### Field ID:
BT-39

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
50 characters

### Since Version:
Optional

## XML Implementation

### UBL 2.1 Syntax
```
/Invoice/cac:AccountingSupplierParty/cac:Party/cac:PostalAddress/cbc:CountrySubentity
```

### CII (UN/CEFACT) Syntax
```
/CrossIndustryInvoice/SupplyChainTradeTransaction/ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:PostalTradeAddress/ram:CountrySubDivisionName
```

## Why the standard cares about this field

### Business Context
This is useful where regional information matters for tax, routing, or formal postal addressing.

### Legal Requirement
Optional according to EN 16931-1.

## Official sources and tools

- [KoSIT Validator](https://erechnungsvalidator.service-bw.de/)
- [Invoice Converter](/pdf-to-xrechnung)
- [XRechnung Standard](https://xeinkauf.de/xrechnung/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)