diff --git a/VECTO/GUI/MainForm.vb b/VECTO/GUI/MainForm.vb
index 59bef9cd89ea77b40b6a03208d9b53246cbd91ad..1f35cdf96216749aa838507b9ed418e782f4c0c2 100644
--- a/VECTO/GUI/MainForm.vb
+++ b/VECTO/GUI/MainForm.vb
@@ -1105,6 +1105,20 @@ Imports TUGraz.VectoCore.Utils
         sender.ReportProgress(100, New VectoProgress With {.Target = "ListBox",
                                  .Message =
                                  String.Format("Simulation Finished in {0:0}s", (DateTime.Now() - start).TotalSeconds)})
+
+#if CERTIFICATION_RELEASE
+        dim message as string = nothing
+#else
+#if RELEASE_CANDIDATE
+        dim message as string = "RELEASE CANDIDATE - NOT FOR CERTIFICATION!"
+#else
+        dim message as string = "DEVELOPMENT VERSION - NOT FOR CERTIFICATION!"
+#End If
+#end if
+        if Not string.IsNullOrWhitespace(message) then
+            sender.ReportProgress(100,  New VectoProgress With {.Target = "ListBoxWarning",
+                                     .Message = message})
+        End If
     End Sub