# BR-CL-25 Endpoint identifier scheme must come from CEF EAS

The electronic address (endpoint) scheme identifier (BT-34-1 for the seller, BT-49-1 for the buyer) must belong to the CEF EAS code list.

## Problem Description

The electronic address (endpoint) scheme identifier (BT-34-1 for the seller, BT-49-1 for the buyer) must belong to the CEF EAS code list.

> **ERROR**: XRechnung 3.0

## Context and Significance

This EN16931 core code-list rule enables correct routing of the invoice to an electronic delivery address (e.g. on Peppol).

## Solution

Set the endpoint schemeID to a valid CEF EAS code such as 0088 (GLN), 0204 (German Leitweg-ID) or EM (email address).

- validate
- convert

## Valid Examples

- BT-49-1 = 0204 — German Leitweg-ID
- BT-34-1 = EM — email endpoint

## Invalid Examples

- BT-49-1 = LEITWEG — name instead of an EAS code
- BT-49-1 = 9999 — not in CEF EAS

## Code Examples

### Valid XML
```
<cbc:EndpointID schemeID="EM">seller@example.com</cbc:EndpointID>
```

### Invalid XML
```
<cbc:EndpointID schemeID="EMAIL">seller@example.com</cbc:EndpointID>
```

## Affected Fields

- [BT-34-1 Seller electronic address scheme identifier](/resources/xrechnung/bt-34-seller-electronic-address)
- [BT-49-1 Buyer electronic address scheme identifier](/resources/xrechnung/bt-49-buyer-electronic-address)

## Related Rules

- [BR-CL-10](/resources/kosit-validator-errors/br-cl-10-iso-6523-any-identifier-scheme)

## Validation Tools

- [Official KoSIT Validator](https://erechnungsvalidator.service-bw.de/): Validate your XRechnung files against all BR-DE rules.
- [Convert PDF to XRechnung](/pdf-to-xrechnung): Automatic validation error fixes when converting.

## Related Resources

- [Official Specification](https://xeinkauf.de/xrechnung/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)
- [Complete Error List](/resources/kosit-validator-errors): Overview of all German XRechnung validation rules.