diff --git a/ReportImp/SKMAachen/Invoicing/CustomInvoiceNumberGenerator.cs b/ReportImp/SKMAachen/Invoicing/CustomInvoiceNumberGenerator.cs
index 4bff9a5d4..6f0f2425e 100644
--- a/ReportImp/SKMAachen/Invoicing/CustomInvoiceNumberGenerator.cs
+++ b/ReportImp/SKMAachen/Invoicing/CustomInvoiceNumberGenerator.cs
@@ -19,7 +19,7 @@ namespace SKMAachen.Invoicing
 	{
 		public override string GetNextInvoiceNumber(int increment, InvoiceBase invoiceBase)
 		{
-			string next = base.GetNextInvoiceNumber(increment, invoiceBase);
+			String next = "";
 			String maAbb = "";
 			Customer c = null;
 
@@ -48,6 +48,26 @@ namespace SKMAachen.Invoicing
 						maAbb = String.Format("{0}{1}", hauptbetreuer.Employee.Person.LastName, hauptbetreuer.Employee.Person.FirstName);
 					}
 				}
+				var alleNummern = DAOFactory.GenericDAO.GetAll<InvoiceNumber>();
+				InvoiceNumber number = null;
+
+                foreach (var item in alleNummern)
+                {
+					if (item.Notice == maAbb)
+                    {
+						number = item;
+                    }
+                }
+                if (number == null)
+                {
+                    number = new InvoiceNumber();
+                    number.Notice = maAbb;
+                    number.Pattern = "{MA}{jj}{nnn}";
+                    number.CurrentNumber = 1;
+
+                    DAOFactory.GenericDAO.Insert(number);
+                }
+                next = ApplyPatternWithId(number.Pattern, number.CurrentNumber + increment, null);
 				next = next.Replace("{MA}", maAbb);
 			}