diff --git a/BeWo/View/BeWoWindowBuilder.cs b/BeWo/View/BeWoWindowBuilder.cs
index 78b14db8a..230f13e79 100644
--- a/BeWo/View/BeWoWindowBuilder.cs
+++ b/BeWo/View/BeWoWindowBuilder.cs
@@ -1,5 +1,6 @@
 using BeWo.View.Controls;
 using BeWo.ViewModel;
+using BS.Shared.Extensions;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -55,11 +56,6 @@ namespace BeWo.View
             return beWoWindow;
         }
 
-        public static void ShowErrorMessageBox(string text)
-        {
-            MessageBox.Show(text, "Fehler", MessageBoxButton.OK, MessageBoxImage.Asterisk);
-        }
-
         private static BeWoWindow GetGenericBeWoWindow(string title, double min_height, double height, double max_height, double min_width, double width, double max_width)
         {
             var beWoWindow = new BeWoWindow();
@@ -78,5 +74,18 @@ namespace BeWo.View
 
             return beWoWindow;
         }
+
+        public static void ShowErrorMessageBox(string text)
+        {
+            MessageBox.Show(text, "Fehler", MessageBoxButton.OK, MessageBoxImage.Asterisk);
+        }
+
+        public static void ShowTitleErrorMessageBox(string text, string title)
+        {
+            if (title.IsNullOrWhiteSpace())
+                ShowErrorMessageBox(text);
+            else
+                MessageBox.Show(text, "Fehler", MessageBoxButton.OK, MessageBoxImage.Asterisk);
+        }
     }
 }
diff --git a/BeWo/View/Controls/Utils/ColorPicker.xaml b/BeWo/View/Controls/Utils/ColorPicker.xaml
index b03225071..35c3cf42a 100644
--- a/BeWo/View/Controls/Utils/ColorPicker.xaml
+++ b/BeWo/View/Controls/Utils/ColorPicker.xaml
@@ -14,26 +14,26 @@
             x:Name="btn"
             Height="24"
             Padding="0"
-            Background="Transparent"
             HorizontalContentAlignment="Stretch"
             VerticalContentAlignment="Stretch"
             dx:ThemeManager.ThemeName="None"
+            Background="Transparent"
             BorderBrush="Black"
             BorderThickness="1"
             Click="button_select_color_Click"
             Style="{x:Null}">
             <Grid Background="{Binding ElementName=root, Path=SelectedColor}">
                 <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="*"/>
-                    <ColumnDefinition Width="auto"/>
+                    <ColumnDefinition Width="*" />
+                    <ColumnDefinition Width="auto" />
                 </Grid.ColumnDefinitions>
                 <Button
-                    Margin="2"
+                    x:Name="delete_btn"
                     Grid.Column="1"
-                x:Name="delete_btn"
-                Width="18"
-                Height="18"
-                Click="delete_btn_DeleteClick">
+                    Width="18"
+                    Height="18"
+                    Margin="2"
+                    Click="delete_btn_DeleteClick">
                     X
                 </Button>
             </Grid>
diff --git a/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs b/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
index 95aa55fa7..e5ab3bbf5 100644
--- a/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
+++ b/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
@@ -165,7 +165,7 @@ namespace BeWo.View.Detail.Accounting
                     }
                     else
                     {
-                        BeWoWindowBuilder.ShowErrorMessageBox(cb.Message);
+                        BeWoWindowBuilder.ShowTitleErrorMessageBox(cb.Message, cb.TitleMessage);
                     }
                 }));
         }
diff --git a/Service/ServiceImplementations/AccountingServiceImp.cs b/Service/ServiceImplementations/AccountingServiceImp.cs
index d786d3735..39ad7908c 100644
--- a/Service/ServiceImplementations/AccountingServiceImp.cs
+++ b/Service/ServiceImplementations/AccountingServiceImp.cs
@@ -861,7 +861,9 @@ namespace BeWo.Service.ServiceImplementations
 			}
 			catch (GkvException exc)
 			{
-				response.Message = exc.Message;
+				if (exc.Title.IsNotNullOrWhiteSpace())
+					response.TitleMessage = exc.Title;
+				response.Message = exc.Message;				
 			}
 			catch (Exception e)
 			{
diff --git a/Shared/DataContracts/AppResponseDC.cs b/Shared/DataContracts/AppResponseDC.cs
index f088fa02b..90994c38b 100644
--- a/Shared/DataContracts/AppResponseDC.cs
+++ b/Shared/DataContracts/AppResponseDC.cs
@@ -12,6 +12,7 @@ namespace BS.Shared.DataContracts
 	{
 		[DataMember] public bool Success { get; set; }
 		[DataMember] public string Message { get; set; }
+		[DataMember] public string TitleMessage { get; set; }
 
 		public AppResponseDC(bool success)
 		{
@@ -22,5 +23,10 @@ namespace BS.Shared.DataContracts
 		{
 			Message = message;
 		}
+
+		public AppResponseDC(bool success, string message, string title) : this(success, message)
+		{
+			TitleMessage = title;
+		}
 	}
 }
diff --git a/Shared/DataContracts/GkvAbrechnung/GkvResponseDC.cs b/Shared/DataContracts/GkvAbrechnung/GkvResponseDC.cs
index 123384dc0..8e51ff31d 100644
--- a/Shared/DataContracts/GkvAbrechnung/GkvResponseDC.cs
+++ b/Shared/DataContracts/GkvAbrechnung/GkvResponseDC.cs
@@ -13,5 +13,6 @@ namespace BS.Shared.DataContracts.GkvAbrechnung
 		public GkvResponseDC() : base(false) { }
 		public GkvResponseDC(bool success) : base(success) { }
 		public GkvResponseDC(bool success, string message) : base(success, message) { }
+		public GkvResponseDC(bool success, string message, string title) : base(success, message, title) { }
 	}
 }
diff --git a/Shared/Extensions/StringExtensions.cs b/Shared/Extensions/StringExtensions.cs
index cb8fa89e2..1634cc959 100644
--- a/Shared/Extensions/StringExtensions.cs
+++ b/Shared/Extensions/StringExtensions.cs
@@ -88,10 +88,12 @@ namespace BS.Shared.Extensions
             return pString?.Replace("ẞ", "ß");
         }
 
+        public static bool IsNotNullOrWhiteSpace(this string pString)
+            => !pString.IsNullOrWhiteSpace();
+        public static bool IsNullOrWhiteSpace(this string str)
+            => string.IsNullOrEmpty(str);
         public static string ToNullIfEmpty(this string str)
-		{
-            return string.IsNullOrWhiteSpace(str) ? null : str;
-		}
+            => str.IsNullOrWhiteSpace() ? null : str;
 
         public static string ToFormatFollows(this string str1, string str2, char seperator = ' ')
 		{