# BT-45 Buyer trading name

Trading or brand name of the buyer when it differs from the legal buyer name.

## Quick answer

> **Buyer details**: Who receives the invoice and which buyer records or routing data must match.

- [Validate XML](/en/xrechnung-validator?source=resource&bt=BT-45)
- [Convert invoice](/en/pdf-to-xrechnung?source=resource&bt=BT-45)

## In plain language

This helps the seller address the invoice with the name the buyer actually uses in day-to-day business.

## What you usually enter here

Trading or brand name

Typical valid values include: City Utilities

Optional according to EN 16931-1.

## Where the field sits

BT-45 belongs to the Buyer part of the invoice. UBL 2.1 Syntax: Invoice › cac:AccountingCustomerParty › cac:Party › cac:PartyName › cbc:Name. CII (UN/CEFACT) Syntax: rsm:CrossIndustryInvoice › rsm:SupplyChainTradeTransaction › ram:ApplicableHeaderTradeAgreement › ram:BuyerTradeParty › ram:SpecifiedLegalOrganization › ram:TradingBusinessName.

## Valid Examples

- City Utilities

## Related Fields

- [BT-44 Buyer Name](/resources/xrechnung/bt-44-buyer-name)

## 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-45

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
200 characters

## XML Implementation

### UBL 2.1 Syntax
```
/Invoice/cac:AccountingCustomerParty/cac:Party/cac:PartyName/cbc:Name
```

### CII (UN/CEFACT) Syntax
```
/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerTradeParty/ram:SpecifiedLegalOrganization/ram:TradingBusinessName
```

## 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)