# BT-35 Seller Address Line 1

The main address line identifying the seller's postal address. Typically contains street name and number.

## Quick answer

The main address line identifying the seller's postal address. Typically contains street name and number.

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

## In plain language

The main address line identifying the seller's postal address. Typically contains street name and number.

The main address line identifying the seller's postal address. Typically contains street name and number.

Essential component of the seller's legal address for correspondence and legal service of documents

## What you usually enter here

Free text for street and number

Typical valid values include: Musterstraße 123, Hauptplatz 45a, Am Marktplatz 1-3, Industrieallee 78

Mandatory field for complete seller identification according to EN 16931 and German commercial law

## What goes wrong often

Avoid values like: Str. 123, AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

Relevant rule codes: BR-CO-26

## Examples in context

Essential component of the seller's legal address for correspondence and legal service of documents

Mandatory field for complete seller identification according to EN 16931 and German commercial law

## Valid Examples

- Musterstraße 123
- Hauptplatz 45a
- Am Marktplatz 1-3
- Industrieallee 78
- Bahnhofstraße 12

## Invalid Examples

- Str. 123
- AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Related Fields

Essential component of the seller's legal address for correspondence and legal service of documents

- [BT-27 Seller Name](/resources/xrechnung/bt-27-seller-name)
- [BT-36 Seller address line 2](/resources/xrechnung/bt-36-seller-address-line-2)
- [BT-37 Seller City](/resources/xrechnung/bt-37-seller-city)
- [BT-38 Seller Post Code](/resources/xrechnung/bt-38-seller-post-code)
- [BT-39 Seller country subdivision](/resources/xrechnung/bt-39-seller-country-subdivision)
- [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-35

### Data Type:
text

### Cardinality:
1..1

### Requirement:
Mandatory

### Max Length:
100 characters

### Since Version:
XRechnung 1.0+

## XML Implementation

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

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

## Validation Rules

### BR-CO-26
BR-CO-26

## Why the standard cares about this field

### Business Context
Essential component of the seller's legal address for correspondence and legal service of documents

### Legal Requirement
Mandatory field for complete seller identification according to EN 16931 and German commercial law

## FAQ

### How should I format German street addresses?
Follow German postal standards: "Straßenname Hausnummer" (e.g., "Musterstraße 123", "Am Marktplatz 45a"). Include apartment/suite numbers if relevant.

### What if the address doesn't fit in one line?
Use the primary street and number in Address Line 1. Additional information like building names or complex numbers can go in Address Line 2 (BT-36).

### Should I include PO Box information here?
No, if using a PO Box, put it in Address Line 1 as "Postfach [number]" but ensure this is the actual business address. Physical addresses are preferred for business registration.

## 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)