BR-DE-6: Your telephone number is missing. How to fix it

What the rule checks

The rule checks that the field "Seller contact telephone number" (BT-42) is present and not empty inside the block with your contact details (BG-6). It does not check how the number is written; that is the job of the warning BR-DE-27, which expects at least three digits. If the contact block is missing entirely, the report names BR-DE-2 instead.

Why files fail it

• No telephone number is held in your master data, or in the user profile your software takes the contact details from.
• The number appears only in the letterhead or the footer of the PDF, not in the structured data.
• The field was left empty on purpose because you prefer questions by email. XRechnung requires both regardless.

How to fix it

1. 1Enter a telephone number where questions about the invoice get answered. The field is "Seller contact telephone number" (BT-42) in the standard.
2. 2Write it with the country code, for example +49 30 1234567. The rule prescribes no format, but this way it can be dialled from abroad too.
3. 3Do not use a placeholder. A dash or text without digits does satisfy this rule, but it triggers the warning BR-DE-27. That is a warning, not a refusal.
4. 4In our form it is the "Contact phone" field in the "Your details" section. The invoice cannot be generated without it, and a hint appears as you type if the number is not in the usual form with a country code.