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    BR-DEX – XRechnung extension

    BR-DEX-05: legal registration scheme not from the ISO 6523 list

    ErrorXRechnung business rule (KoSIT)

    Official message

    [BR-DEX-05] Any scheme identifier in MUST be coded using one of the ISO 6523 ICD list.

    Source: KoSIT XRechnung, version 3.0.2 (Schematron 2.6.0)

    What the message means

    The legal registration number of a party of your invoice, such as the seller's commercial register number, carries a scheme that is not in the ISO 6523 list. The scheme is meant to say which register keeps the number; the extension requires the numeric ISO code for it. A text such as HRB or commercial register in the scheme field is rejected. The number itself may contain the register abbreviation, the attribute only the code.

    Common causes

    • The register abbreviation HRB was entered as the scheme instead of into the number.
    • A national code was invented because the ISO code was unknown.
    • The software sets one fixed, invalid scheme for all registration numbers.

    How to fix it

    Enter in cbc:CompanyID the full registration number, for example HRB 12345 with the register court, and set in the schemeID attribute a code of the ISO 6523 list or leave the attribute out. In CII the same applies to ram:ID of the SpecifiedLegalOrganization.

    Before – invalid
    <cac:PartyLegalEntity>
  <cbc:RegistrationName>Beispiel GmbH</cbc:RegistrationName>
  <cbc:CompanyID schemeID="HRB">12345</cbc:CompanyID>
</cac:PartyLegalEntity>
    After – corrected
    <cac:PartyLegalEntity>
  <cbc:RegistrationName>Beispiel GmbH</cbc:RegistrationName>
  <cbc:CompanyID>HRB 12345, Amtsgericht Berlin-Charlottenburg</cbc:CompanyID>
</cac:PartyLegalEntity>

    Frequently asked

    Is there an ISO 6523 code for the German commercial register?

    The list holds codes for individual registers and identifier systems; many national registers have none. Then the attribute stays out and the number names the register in its text.

    Is the registration number mandatory at all?

    No, BT-30 is optional. If it is given, a scheme that is set must come from the list.

    Fields concerned

    • BT-30
    • BT-47
    • BT-61

    Related rules

    • BR-AE-04
    • BR-AF-04
    • BR-AG-04

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    Technical details
    UBL · Context (XPath)
    cac:PartyLegalEntity/cbc:CompanyID[@schemeID and $isExtension]
    UBL · Schematron test
    ((not(contains(normalize-space(@schemeID), ' ')) and contains($ISO-6523-ICD-EXT-CODES, concat(' ', normalize-space(@schemeID), ' '))))
    CII · Context (XPath)
    ram:ID[@schemeID and $isExtension][not(ancestor::ram:SpecifiedTaxRegistration)]
    CII · Schematron test
    ((not(contains(normalize-space(@schemeID), ' ')) and contains($ISO-6523-ICD-EXT-CODES, concat(' ', normalize-space(@schemeID), ' '))))

    Explanation written on 14 September 2026