diff --git a/ReportImp/HshCologne/Service/CustomAccountingService.cs b/ReportImp/HshCologne/Service/CustomAccountingService.cs
new file mode 100644
index 000000000..e4850611f
--- /dev/null
+++ b/ReportImp/HshCologne/Service/CustomAccountingService.cs
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows;
+using BeWo.Data.Access;
+using BeWo.Data.Entities;
+using BeWo.Service.DCEntityMapper;
+using BeWo.Service.Plugins;
+using BS.Shared;
+using BS.Shared.DataContracts;
+
+
+
+namespace HshCologne.Service
+{
+	public class CustomAccountingService : AccountingService
+    {
+        public override ServiceInvoice ErstelleStornoRechnung(InvoiceBaseDC ibdc)
+        {
+            var i = base.ErstelleStornoRechnung(ibdc);
+            int invoiceCounter = 0;
+            var inc = PluginLoader.FindClass<InvoiceNumberGenerator>();
+            i.InvoiceBase.InvoiceNumber = inc.GetNextInvoiceNumber(invoiceCounter, i.InvoiceBase) + " Storno";
+
+            if (String.IsNullOrEmpty(i.InvoiceBase.InvoiceTypeText))
+            {
+                i.InvoiceBase.InvoiceTypeText = "Storno";
+            }
+            else
+            {
+                i.InvoiceBase.InvoiceTypeText += " Storno";
+            }
+            
+            DAOFactory.GenericDAO.Insert(i);
+            inc.IncreaseInvoiceNumber(1, null);
+            return i;
+        }
+    }
+}
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