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BR-DE-6 — Seller telephone number (BT-42) is missing

• Standard: XRechnung
• Severity: fatal
• Business Terms: BT-42

Meaning

The "Seller contact telephone number" element (BT-42) must be present — cbc:Telephone inside the seller contact group.

Possible causes

• cbc:Telephone in the seller cac:Contact is absent or empty.

How to fix it

• Set BT-42 (cbc:Telephone) to the contact telephone number; at least three digits (see BR-DE-27).

Affected fields

• /ubl:Invoice/cac:AccountingSupplierParty/cac:Party/cac:Contact/cbc:Telephone

Example (invalid invoice)

invalid/BR-DE-6/ubl-inv-missing-seller-phone.xml