# BT-36 Seller address line 2

Additional seller address information such as building, floor, or department.

## Quick answer

Additional seller address information such as building, floor, or department.

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

- validate
- convert

## In plain language

Additional seller address information such as building, floor, or department.

Additional seller address information such as building, floor, or department.

Use this line when one address line is not enough to identify the seller location clearly.

## What you usually enter here

Additional address details

Typical valid values include: 2nd Floor

Optional according to EN 16931-1.

## What goes wrong often

Avoid values like:

## Examples in context

Use this line when one address line is not enough to identify the seller location clearly.

Optional according to EN 16931-1.

## Valid Examples

- 2nd Floor

## Related Fields

Use this line when one address line is not enough to identify the seller location clearly.

- [BT-35 Seller Address Line 1](/resources/xrechnung/bt-35-seller-address-line-1)
- [BT-37 Seller City](/resources/xrechnung/bt-37-seller-city)

## 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-36

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
100 characters

### Since Version:
Optional

## XML Implementation

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

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

## Why the standard cares about this field

### Business Context
Use this line when one address line is not enough to identify the seller location clearly.

### 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)