# BT-33 Seller additional legal information

Additional legal information about the seller that should appear on the invoice.

## Quick answer

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

- [Validate XML](/en/xrechnung-validator?source=resource&bt=BT-33)
- [Convert invoice](/en/pdf-to-xrechnung?source=resource&bt=BT-33)

## In plain language

Use this for court seat, management details, registration court, or other legal statements the business wants or must disclose.

## What you usually enter here

Free-text legal disclosure

Typical valid values include: Amtsgericht Köln HRB 12345

Optional according to EN 16931-1.

## Where the field sits

BT-33 belongs to the Seller part of the invoice. UBL 2.1 Syntax: Invoice › cac:AccountingSupplierParty › cac:Party › cac:PartyLegalEntity › cbc:CompanyLegalForm. CII (UN/CEFACT) Syntax: rsm:CrossIndustryInvoice › rsm:SupplyChainTradeTransaction › ram:ApplicableHeaderTradeAgreement › ram:SellerTradeParty › ram:Description.

## Valid Examples

- Amtsgericht Köln HRB 12345

## Related Fields

- [BT-27 Seller Name](/resources/xrechnung/bt-27-seller-name)
- [BT-30 Seller legal registration identifier](/resources/xrechnung/bt-30-seller-legal-registration-identifier)

## 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-33

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
200 characters

## XML Implementation

### UBL 2.1 Syntax
```
/Invoice/cac:AccountingSupplierParty/cac:Party/cac:PartyLegalEntity/cbc:CompanyLegalForm
```

### CII (UN/CEFACT) Syntax
```
/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:Description
```

## Create an XRechnung from your PDF

The converter reads the invoice and shows the fields it found before download, so you can check and correct the values. No PDF? Fill in the XRechnung directly in the form.

- [Convert invoice](/en/pdf-to-xrechnung)
- [Fill in XRechnung in the form](/en/create-xrechnung)

Trying it and buying a single conversion work without an account. Subscriptions from €10/month with annual billing (excl. taxes), or €5 per conversion (excl. taxes) without a subscription.

## Official sources and tools

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