# BR-DE-2 — Seller contact missing (XRechnung)

> https://billhorse.com/en/rules/br-de-2/

## What does this error mean?

XRechnung requires seller contact details (BG-6).

## How to fix it

UBL: add cac:Contact with Name, Telephone and ElectronicMail on the seller (see BR-DE-5/6/7).