diff --git a/ConsoleApp3/CardMarketParser.cs b/ConsoleApp3/CardMarketParser.cs
index cf41253..6e0fc3a 100644
--- a/ConsoleApp3/CardMarketParser.cs
+++ b/ConsoleApp3/CardMarketParser.cs
@@ -12,7 +12,6 @@ namespace CardmarketBot
     {
         private readonly string username;
         private readonly string password;
-        private readonly IUsedRepository _usedRepository;
 
         Dictionary<string, Helper.Porto> portoberechnung = new Dictionary<string, Helper.Porto>()
         {
@@ -24,11 +23,10 @@ namespace CardmarketBot
             {"3,20 €", Helper.Porto.PRIO270 },
         };
 
-        public CardMarketParser(string username, string password, IUsedRepository repository)
+        public CardMarketParser(string username, string password)
         {
             this.username = username;
             this.password = password;
-            _usedRepository = repository;
         }
 
         public List<Kunde> ParseCardMarket()
@@ -64,7 +62,7 @@ namespace CardmarketBot
 
             List<string> ids = new List<string>();
             List<Kunde> kunden = new List<Kunde>();
-            List<string> bereitsbearbeitet = _usedRepository.Query;
+            
             IWebElement element;
             try
             {
@@ -78,7 +76,6 @@ namespace CardmarketBot
                 
                 for (int i = 8; i < datas.Length; i += 7)
                 {
-                    //if (bereitsbearbeitet.Find(x => x.Equals(datas[i])) != null) continue;
                     ids.Add(datas[i]);
                 }  
             }
@@ -97,8 +94,6 @@ namespace CardmarketBot
 
                 Kunde kunde = Helper.ConvertToKunde(element.Text);
 
-                if (bereitsbearbeitet.Find(x => x.Equals(id)) != null) kunde.Rechnungerstellt = true;
-
                 // Bezahldatum
                 element = cd.FindElement(By.XPath("/html/body/main/section/div/div[1]/div/div[2]/div/div[2]/div[2]"));
                 kunde.Bezahldatum = Helper.ConvertBezahlDatum(element.Text);
diff --git a/ConsoleApp3/InvoiceParser.cs b/ConsoleApp3/InvoiceParser.cs
index 5626d2d..d736ae6 100644
--- a/ConsoleApp3/InvoiceParser.cs
+++ b/ConsoleApp3/InvoiceParser.cs
@@ -42,7 +42,7 @@ namespace CardmarketBot
         List<Kunde> kunden;
         public InvoiceParser(List<Kunde> kunden)
         {
-            this.kunden = kunden.FindAll(x => x.Rechnungerstellt != true);
+            this.kunden = kunden;
         }
        
         public List<ModelRechnung> GetInvoices()
@@ -111,20 +111,16 @@ namespace CardmarketBot
                     Id = null,
                     MapAll = true,
                     Quantity = 1,
-                    //Price = PortoPreis[kunde.Versandskosten],
                     Name = "Versandskosten",
                     PositionNumber = 0,
                     Discount = 0,
                     TaxRate = 19,
-                    //PriceGross = PortoPreis[kunde.Versandskosten],
                     PriceTax = 19
                 };
                 if(kunde.OverrideVersandskosten != null)
                 {
-                    //Debugger.Break();
                     temp.InvoicePosSaves[temp.InvoicePosSaves.Length - 1].Price = Convert.ToDecimal(kunde.OverrideVersandskosten);
                     temp.InvoicePosSaves[temp.InvoicePosSaves.Length - 1].Price = Convert.ToDecimal(kunde.OverrideVersandskosten);
-                    //Debugger.Break();
                 }
                 else
                 {
diff --git a/ConsoleApp3/Kunde.cs b/ConsoleApp3/Kunde.cs
index 1a392c7..fe56a1c 100644
--- a/ConsoleApp3/Kunde.cs
+++ b/ConsoleApp3/Kunde.cs
@@ -11,7 +11,7 @@ class Kunde
     string plz;
     string ort;
     string land;
-    bool rechnungerstellt = false;
+    
     List<Artikel> artikels = new List<Artikel>();
     public DateTime Bezahldatum { get; set; }
 
@@ -41,8 +41,6 @@ class Kunde
         }
     }
 
-    public bool Rechnungerstellt { get => rechnungerstellt; set => rechnungerstellt = value; }
-
     public Kunde(string Name, string Strasse, string Hausnummer, string PLZ, string Ort, string Land)
     {
         name = Name;
diff --git a/ConsoleApp3/Program.cs b/ConsoleApp3/Program.cs
index 58eec4c..0f484a4 100644
--- a/ConsoleApp3/Program.cs
+++ b/ConsoleApp3/Program.cs
@@ -3,6 +3,9 @@ using ConsoleApp3;
 using ConsoleApp3.Contracts;
 using System.Text.RegularExpressions;
 using System.Diagnostics;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
 
 namespace CardmarketBot
 {
@@ -10,12 +13,13 @@ namespace CardmarketBot
     {
         static void Main(string[] args)
         {
-            IUsedRepository usedRepository = new UsedRepository();
+            CheckVerkauf("120202");
+            //IUsedRepository usedRepository = new UsedRepository();
             
 
             // Kunden aus Cardmarket erstellen
             List<Kunde> kunden = new List<Kunde>();
-            CardMarketParser cardMarketParser = new CardMarketParser("More-Tcg", "Magnatpower310!!", usedRepository);
+            CardMarketParser cardMarketParser = new CardMarketParser("More-Tcg", "Magnatpower310!!");
             kunden = cardMarketParser.ParseCardMarket();
 
 
@@ -29,21 +33,67 @@ namespace CardmarketBot
             
             foreach (ModelRechnung item in rechnungen)
             {
-                SevdeskService sevdeskService = new SevdeskService("7251554968610b78ca865b2b774b4134");
-                sevdeskService.Create(item);
-                
+                var str_header = item.Invoice.Header;
+                if (str_header != null)
+                {
+                    Regex regex = new Regex("[0-9]*$");
+                    Match matched = regex.Match(str_header);
+                    string verkaufnummer = str_header.Substring(matched.Index);
+                    if(!CheckVerkauf(verkaufnummer))
+                    {
+                        Debugger.Break();
+                        SevdeskService sevdeskService = new SevdeskService("7251554968610b78ca865b2b774b4134");
+                        sevdeskService.Create(item);
+                    }
+                }
             }
             
             // Post CSV Erstellen
             DeutschePost deutschePost = new DeutschePost(kunden);
             deutschePost.GenerateCSV();
             
-
-            usedRepository.Insert(kunden);
-
             Console.WriteLine("Fertig");
             Console.ReadLine();
             
         }
+
+        private static bool CheckVerkauf(string verkaufnummer)
+        {
+            byte[] bytes = new byte[1024];
+
+            IPHostEntry host =  Dns.GetHostEntry("server");
+            IPAddress iPAddress = host.AddressList[0];
+            
+            
+            
+            IPEndPoint remoteEP = new IPEndPoint(iPAddress, 4000);
+            
+            Socket sender = new Socket(iPAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
+            try
+            {
+                sender.Connect(remoteEP);
+                Console.WriteLine("Socket connected to {0}", sender.RemoteEndPoint.ToString());
+                byte[] msg = Encoding.ASCII.GetBytes(string.Format("TEST #{0}<EOF>", verkaufnummer));
+                int bytesSent = sender.Send(msg);
+                int bytesRec = sender.Receive(bytes);
+                Console.WriteLine("Replying = {0}", Encoding.ASCII.GetString(bytes, 0, bytesRec));
+                sender.Shutdown(SocketShutdown.Both);
+                sender.Close();
+            }
+            catch (ArgumentNullException ane)
+            {
+                Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
+            }
+            catch (SocketException se)
+            {
+                Console.WriteLine("SocketException : {0}", se.ToString());
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("Unexpected exception : {0}", e.ToString());
+            }
+
+            return true;
+        }
     }
 }
\ No newline at end of file
diff --git a/ConsoleApp3/SocketClient.cs b/ConsoleApp3/SocketClient.cs
new file mode 100644
index 0000000..9b0ee99
--- /dev/null
+++ b/ConsoleApp3/SocketClient.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CardMarketBot
+{
+    internal class SocketClient
+    {
+    }
+}