# BR-DE-5 — Contact name missing (XRechnung)

> https://billhorse.com/en/rules/br-de-5/

## What does this error mean?

The seller contact name (BT-41) is mandatory in XRechnung.

## How to fix it

UBL: Contact/Name. CII: PersonName or DepartmentName in DefinedTradeContact — a department name suffices.