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Credit notes and the preceding invoice (IBR-032-OM)

IBR-032-OM — the one that catches everyone​

Fatal. If the type code is 381, 383 or 261, the document MUST carry all three of the preceding invoice's reference, issue date and UUID. Missing any one is a hard rejection:

<cac:BillingReference>
    <cac:InvoiceDocumentReference>
        <cbc:ID>INV-2026-00042</cbc:ID>                      <!-- IBT-025 -->
        <cbc:IssueDate>2026-07-14</cbc:IssueDate>            <!-- IBT-026 -->
        <cbc:UUID>7d4f1e2a-...-9c3b</cbc:UUID>               <!-- BTOM-031 -->
    </cac:InvoiceDocumentReference>
</cac:BillingReference>

The UUID is the one people omit, because BIS Billing 3.0 does not ask for it. It must be the original invoice's UUID, not a fresh one.

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