BR-DE-9

The invoice must contain the buyer's post code (BT-53) — the counterpart of BR-DE-8 for the city.

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

Official rule text

Das Element "Buyer post code" (BT-53) muss übermittelt werden.

Why it happens

Same root as BR-DE-8: unsplit address lines. It also bites invoices to buyers in countries without a post-code system, where the field is simply left empty.

How to fix it

Send the post code in BT-53 (cbc:PostalZone in UBL, ram:PostcodeCode in CII). If the buyer's country has no post codes, use whatever the buyer uses postally — the check does not allow the field to be empty.

NormAPI provides technical validation, not tax or legal advice.