diff --git a/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapper.java b/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapper.java
index bb3097ca..05119dbf 100644
--- a/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapper.java
+++ b/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapper.java
@@ -122,6 +122,10 @@ public List<ReportedProductItemStock> itemStockSammToReportedProductItemStock(It
             return outputList;
         }
 
+        // When deserializing a Samm from a customer, who has sent a report on the
+        // stocks he received from us, the materialGlobalAssetId used in the communication
+        // was set by us (as the supplying side). Therefore the materialGlobalAssetId in
+        // the Samm is the one in our Material entity.
         Material material = materialService.findByMaterialNumberCx(matNbrCatenaX);
         if (material == null) {
             log.warn("Could not identify materialPartnerRelation with matNbrCatenaX " + matNbrCatenaX + " and partner bpnl " + partner.getBpnl());
@@ -130,8 +134,6 @@ public List<ReportedProductItemStock> itemStockSammToReportedProductItemStock(It
 
         var mpr = mprService.find(material, partner);
 
-
-
         for (var position : samm.getPositions()) {
             String supplierOrderId = null, customerOrderPositionId = null, customerOrderId = null;
             if (position.getOrderPositionReference() != null) {
@@ -173,13 +175,16 @@ public List<ReportedMaterialItemStock> itemStockSammToReportedMaterialItemStock(
             log.warn("Could not identify materialPartnerRelation with matNbrCatenaX " + matNbrCatenaX + " and partner bpnl " + partner.getBpnl());
             return outputList;
         }
+        // When deserializing a Samm from a supplier, who has sent a report on the
+        // stocks he has prepared for us, the materialGlobalAssetId used in the communication
+        // was set by the supplying partner. Therefore the materialGlobalAssetId in
+        // the Samm is the one in our MaterialPartnerRelation entity with that partner.
         Material material = mpr.getMaterial();
         if (material == null) {
             log.warn("Could not identify material with CatenaXNbr " + matNbrCatenaX);
             return outputList;
         }
 
-
         for (var position : samm.getPositions()) {
             String supplierOrderId = null, customerOrderPositionId = null, customerOrderId = null;
             if (position.getOrderPositionReference() != null) {
diff --git a/backend/src/test/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapperTest.java b/backend/src/test/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapperTest.java
index ab1066de..a161adad 100644
--- a/backend/src/test/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapperTest.java
+++ b/backend/src/test/java/org/eclipse/tractusx/puris/backend/stock/logic/adapter/ItemStockSammMapperTest.java
@@ -392,7 +392,6 @@ void test_unmarshalling() {
         mpr.setPartnerMaterialNumber(CUSTOMER_MAT_NUMBER);
         mpr.setPartnerCXNumber(CX_MAT_NUMBER);
 
-//        when(mprService.findByPartnerAndPartnerCXNumber(customerPartner, CX_MAT_NUMBER)).thenReturn(mpr);
         when(materialService.findByMaterialNumberCx(CX_MAT_NUMBER)).thenReturn(material);
         when(mprService.find(material, customerPartner)).thenReturn(mpr);