BR-DE-6: seller phone number missing

The seller contact (BG-6) needs a telephone number (BT-42). A related rule, BR-DE-27, warns when the number has fewer than three digits.

What the validator reports

BR-DE-6: Das Element "Seller contact telephone number" (BT-42) muss übermittelt werden.

This is the message our validator returns for an invoice with this problem. The text is the official rule text.

The official XRechnung rule texts are published in German, so the message is in German.

Fill in a phone number with at least three digits in the seller contact.

<cac:Contact>
  <cbc:Telephone>+49 30 1234567</cbc:Telephone>
</cac:Contact>

"contact": {
  "phone": "+49 30 1234567"
}