diff --git a/library/src/main/java/org/mustangproject/Item.java b/library/src/main/java/org/mustangproject/Item.java
index 2273c9da..719caf83 100644
--- a/library/src/main/java/org/mustangproject/Item.java
+++ b/library/src/main/java/org/mustangproject/Item.java
@@ -35,7 +35,7 @@ public class Item implements IZUGFeRDExportableItem {
 	protected String id;
 	protected String buyerOrderReferencedDocumentLineID = null;
 	protected String buyerOrderReferencedDocumentID = null;
-	protected IReferencedDocument tenderReferencedDocument=null;
+	protected ReferencedDocument tenderReferencedDocument=null;
 	protected Product product;
 	protected ArrayList<String> notes = null;
 	protected ArrayList<ReferencedDocument> referencedDocuments = null;
@@ -621,11 +621,11 @@ public class Item implements IZUGFeRDExportableItem {
 	}
 
 	@Override
-	public IReferencedDocument getTenderReferencedDocument() {
+	public ReferencedDocument getTenderReferencedDocument() {
 		return tenderReferencedDocument;
 	}
 
-	public Item setTenderReferencedDocument(IReferencedDocument idr) {
+	public Item setTenderReferencedDocument(ReferencedDocument idr) {
 		tenderReferencedDocument=idr;
 		return this;
 	}
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java
index 99314cd9..cf16512c 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java
@@ -183,6 +183,15 @@ public class ZF2ZInvoiceImporterTest extends ResourceCase {
 		// Reading ZUGFeRD
 		assertEquals("4711", invoice.getZFItems()[0].getProduct().getSellerAssignedID());
 		assertEquals("9384", invoice.getSellerOrderReferencedDocumentID());
+		assertEquals("90-kl-98798-C", invoice.getTenderReferencedDocument().getIssuerAssignedID());
+
+		IReferencedDocument rd=invoice.getZFItems()[0].getTenderReferencedDocument();
+		assertEquals("90-kl-98798-C1", rd.getIssuerAssignedID());
+		assertEquals("AAG", rd.getReferenceTypeCode());
+		assertEquals("2025-10-13", sdf.format(rd.getFormattedIssueDateTime()));
+
+
+
 		assertEquals("90-kl-98798-C", invoice.getTenderReferencedDocument().getIssuerAssignedID());
 		assertEquals("2025-10-12", sdf.format(invoice.getTenderReferencedDocument().getFormattedIssueDateTime()));
 		assertEquals("sender@test.org", invoice.getSender().getEmail());