diff --git a/src/QUI/ERP/Accounting/Invoice/Invoice.php b/src/QUI/ERP/Accounting/Invoice/Invoice.php
index e4b1e8e5ced9b3cde28b37acdc022d7f4531590d..ec537c23a1155981b5d3012b1b5f4fbc25bee001 100644
--- a/src/QUI/ERP/Accounting/Invoice/Invoice.php
+++ b/src/QUI/ERP/Accounting/Invoice/Invoice.php
@@ -46,6 +46,7 @@
 class Invoice extends QUI\QDOM implements ErpEntityInterface, ErpTransactionsInterface, ErpCopyInterface
 {
     use QUI\ERP\ErpEntityCustomerFiles;
+    use QUI\ERP\ErpEntityData;
 
     const DUNNING_LEVEL_OPEN = 0; // No Dunning -> Keine Mahnung
     const DUNNING_LEVEL_REMIND = 1; // Payment reminding -> Zahlungserinnerung
@@ -1024,6 +1025,7 @@ public function createCreditNote(
         // saving copy
         $Copy->setData('originalId', $this->getId());
         $Copy->setData('originalIdPrefixed', $this->getPrefixedNumber());
+        $Copy->setData('originalInvoice', $this->getReferenceData());
 
         $Copy->setAttribute('date', date('Y-m-d H:i:s'));
         $Copy->setAttribute('additional_invoice_text', $additionalText);
@@ -1204,6 +1206,7 @@ public function createReversal(
         // saving copy
         $Copy->setData('originalId', $this->getId());
         $Copy->setData('originalIdPrefixed', $this->getPrefixedNumber());
+        $Copy->setData('originalInvoice', $this->getReferenceData());
 
         $Copy->setAttribute('date', date('Y-m-d H:i:s'));
         $Copy->setAttribute('additional_invoice_text', $additionalText);
diff --git a/src/QUI/ERP/Accounting/Invoice/InvoiceTemporary.php b/src/QUI/ERP/Accounting/Invoice/InvoiceTemporary.php
index f0d2d861b57a1215d3074c687f95709afb71773a..25d460c2a11678ecd7c86c96a91d0b9063af0c64 100644
--- a/src/QUI/ERP/Accounting/Invoice/InvoiceTemporary.php
+++ b/src/QUI/ERP/Accounting/Invoice/InvoiceTemporary.php
@@ -51,6 +51,7 @@
 class InvoiceTemporary extends QUI\QDOM implements ErpEntityInterface, ErpTransactionsInterface, ErpCopyInterface
 {
     use QUI\ERP\ErpEntityCustomerFiles;
+    use QUI\ERP\ErpEntityData;
 
     /**
      * Special attributes