BR-DE-6

A telephone number for the seller contact (BT-42) must be transmitted.

Severity: Error
Applies to: CII, UBL
Rule set: v2026-01-31

Official rule text

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

Why it happens

The phone number appears in the PDF letterhead but is not attached to any contact in the data model — so it is missing when the structured document is generated.

How to fix it

Send the number in BT-42: cac:Contact/cbc:Telephone in UBL, ram:TelephoneUniversalCommunication/ram:CompleteNumber in CII. At least three digits, or BR-DE-27 fires as well.

NormAPI provides technical validation, not tax or legal advice.