# PEPPOL-EN16931-R001 Business process must be provided

Peppol requires the business process identifier (BT-23 / ProfileID).

## Problem Description

Peppol requires the business process identifier (BT-23 / ProfileID).

> **ERROR**: XRechnung 3.0

## Context and Significance

BT-23 tells Peppol access points which process rules to apply. Missing values block routing and validation.

## Solution

Set BT-23 to the Peppol billing process identifier required by the receiver profile.

- validate
- convert

## Valid Examples

- BT-23 / ProfileID contains the Peppol billing process URN

## Invalid Examples

- ProfileID missing
- BT-23 copied from CustomizationID

## Technical Details

### Affected Fields
BT-23 Business process type, ProfileID

## Related Rules

- [PEPPOL-EN16931-R010](/resources/kosit-validator-errors/peppol-en16931-r010-buyer-electronic-address-must-be-present)
- [PEPPOL-EN16931-R020](/resources/kosit-validator-errors/peppol-en16931-r020-seller-electronic-address-must-be-present)

## 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.