BR-DE-8Das Element "Buyer city" (BT-52) muss übermittelt werden.

Official rule text

The buyer's postal address must carry the city (BT-52) — EN 16931 asks only for the country, and the city comes from the German CIUS. It is the buyer's invoicing address that is meant, not the seller's (BR-DE-3) and not a differing delivery address (BR-DE-10).

Severity
Error
Applies to
CII, UBL
Rule set
v2026-08-31
Checked on

Written and checked against the official KoSIT rule set by Dmytro Yalanskyi, NormAPI.

Why does BR-DE-8 happen?

The source system usually holds the address as one collapsed line ("Musterstraße 1, 10115 Berlin") and the mapping never splits it into fields — so the city ends up nowhere. An empty element does not count either: the expression tests with normalize-space. And for a public-sector buyer the Leitweg-ID in BT-10 does not stand in for the address — it is a routing identifier, and group BG-8 still has to be complete.

What the validator checks

The expression the official KoSIT rule set evaluates — not paraphrased, but read from the Schematron file it ships. UBL and CII address different document trees, so the same rule reads differently in each.

UBL
cbc:CityName[boolean(normalize-space(.))]
CII
ram:CityName[boolean(normalize-space(.))]

Source: rule set v2026-08-31

How do you fix BR-DE-8?

Send the city as structured data in BT-52: cac:AccountingCustomerParty/cac:Party/cac:PostalAddress/cbc:CityName in UBL, ram:BuyerTradeParty/ram:PostalTradeAddress/ram:CityName in CII.

In the XML

A UBL fragment. The CII path is named above — same change, different element names.

Fails
<cac:AccountingCustomerParty>
  <cac:Party>
    <cac:PostalAddress>
      <cbc:PostalZone>53113</cbc:PostalZone>
      <cac:Country><cbc:IdentificationCode>DE</cbc:IdentificationCode></cac:Country>
    </cac:PostalAddress>
  </cac:Party>
</cac:AccountingCustomerParty>
Fixed
<cac:AccountingCustomerParty>
  <cac:Party>
    <cac:PostalAddress>
      <cbc:CityName>Bonn</cbc:CityName>
      <cbc:PostalZone>53113</cbc:PostalZone>
      <cac:Country><cbc:IdentificationCode>DE</cbc:IdentificationCode></cac:Country>
    </cac:PostalAddress>
  </cac:Party>
</cac:AccountingCustomerParty>

Related rules

NormAPI provides technical validation, not tax or legal advice.