diff --git a/WGneu/Helpers/Validator.cs b/WGneu/Helpers/Validator.cs
index c5e3e39..926d0d2 100644
--- a/WGneu/Helpers/Validator.cs
+++ b/WGneu/Helpers/Validator.cs
@@ -251,7 +251,8 @@ namespace WGneu.Helpers {
         }
 
         public static ValidationResult CheckUstId(TextBox input, bool optional) {
-            return new(false, "Not implemented yet");
+            // TODO
+            return new(true, "Not implemented yet");
         }
 
         public static ValidationResult CheckMgNr(TextBox input, bool optional, AppDbContext ctx, Member m) {
@@ -282,5 +283,15 @@ namespace WGneu.Helpers {
 
             return new(true, null);
         }
+
+        public static ValidationResult CheckDate(TextBox input, bool optional) {
+            // TODO
+            return new(true, "Not implemented yet");
+        }
+
+        public static ValidationResult CheckPartialDate(TextBox input, bool optional) {
+            // TODO
+            return new(true, "Not implemented yet");
+        }
     }
 }
diff --git a/WGneu/Windows/MemberListWindow.xaml b/WGneu/Windows/MemberListWindow.xaml
index 2a8dcdd..30d57b6 100644
--- a/WGneu/Windows/MemberListWindow.xaml
+++ b/WGneu/Windows/MemberListWindow.xaml
@@ -139,7 +139,8 @@
                          TextChanged="TextBox_TextChanged"/>
 
                 <Label Content="Geburtstag:" Margin="10,100,0,0" Grid.Column="0"/>
-                <TextBox x:Name="BirthdayInput" Margin="0,100,0,0" Grid.Column="1" Width="78" TextAlignment="Right" HorizontalAlignment="Left"/>
+                <TextBox x:Name="BirthdayInput" Margin="0,100,0,0" Grid.Column="1" Width="78" TextAlignment="Right" HorizontalAlignment="Left"
+                         TextChanged="BirthdayInput_TextChanged"/>
 
                 <Label Content="Adresse:" Margin="10,130,0,0"/>
                 <TextBox x:Name="AddressInput" Margin="0,130,10,0" Grid.Column="1" Grid.ColumnSpan="3"
@@ -246,13 +247,16 @@
                 </Grid.ColumnDefinitions>
 
                 <Label Content="Eintritt:" Margin="10,10,0,0" Grid.Column="0"/>
-                <TextBox x:Name="EntryDateInput" Margin="0,10,10,0" Width="76" Grid.Column="1" HorizontalAlignment="Left"  TextAlignment="Right"/>
+                <TextBox x:Name="EntryDateInput" Margin="0,10,10,0" Width="76" Grid.Column="1" HorizontalAlignment="Left"  TextAlignment="Right"
+                         TextChanged="DateInput_TextChanged"/>
 
                 <Label Content="Austritt:" Margin="10,40,0,0" Grid.Column="0"/>
-                <TextBox x:Name="ExitDateInput"  Margin="0,40,10,0" Width="76" Grid.Column="1" HorizontalAlignment="Left" TextAlignment="Right"/>
+                <TextBox x:Name="ExitDateInput"  Margin="0,40,10,0" Width="76" Grid.Column="1" HorizontalAlignment="Left" TextAlignment="Right"
+                         TextChanged="DateInput_TextChanged"/>
 
                 <Label Content="Geschäftsanteile:" Margin="10,70,0,0" Grid.Column="0"/>
-                <TextBox x:Name="BusinessSharesInput" Margin="0,70,10,0" Width="48" Grid.Column="1" HorizontalAlignment="Left"  TextAlignment="Right"/>
+                <TextBox x:Name="BusinessSharesInput" Margin="0,70,10,0" Width="48" Grid.Column="1" HorizontalAlignment="Left"  TextAlignment="Right"
+                         TextChanged="NumericInput_TextChanged"/>
 
                 <Label Content="BH-Konto:" Margin="10,100,0,0" Grid.Column="0"/>
                 <TextBox x:Name="AccountingNrInput" Margin="0,100,10,0" Grid.Column="1"
@@ -281,7 +285,7 @@
                           Margin="0,160,10,0" Grid.Column="1" Grid.ColumnSpan="2"/>
 
                 <Label Content="Anmerkung:" Margin="10,190,0,0" Grid.Column="0"/>
-                <TextBox x:Name="CommentInput" Margin="0,190,10,0" Grid.Column="1" Grid.ColumnSpan="2" TextAlignment="Right"
+                <TextBox x:Name="CommentInput" Margin="0,190,10,0" Grid.Column="1" Grid.ColumnSpan="2"
                          TextChanged="TextBox_TextChanged"/>
 
                 <Label Content="Kontaktart:" Margin="10,220,0,0" Grid.Column="0"/>
diff --git a/WGneu/Windows/MemberListWindow.xaml.cs b/WGneu/Windows/MemberListWindow.xaml.cs
index e2c7832..3a36f73 100644
--- a/WGneu/Windows/MemberListWindow.xaml.cs
+++ b/WGneu/Windows/MemberListWindow.xaml.cs
@@ -546,6 +546,10 @@ namespace WGneu.Windows {
             UpdateButtons();
         }
 
+        private void NumericInput_TextChanged(object sender, RoutedEventArgs evt) {
+            InputTextChanged((TextBox)sender, false, Validator.CheckNumeric);
+        }
+
         private void MgNrInput_TextChanged(object sender, RoutedEventArgs evt) {
             InputTextChanged((TextBox)sender, false, Validator.CheckMgNr);
         }
@@ -562,6 +566,10 @@ namespace WGneu.Windows {
             InputLostFocus((TextBox)sender, true, Validator.CheckPredecessorMgNr);
         }
 
+        private void BirthdayInput_TextChanged(object sender, RoutedEventArgs evt) {
+            InputTextChanged((TextBox)sender, true, Validator.CheckPartialDate);
+        }
+
         private void PlzInput_TextChanged(object sender, RoutedEventArgs evt) {
             InputTextChanged((TextBox)sender, false, Validator.CheckPlz);
             UpdatePlz((TextBox)sender, OrtInput);
@@ -629,5 +637,9 @@ namespace WGneu.Windows {
             InputLostFocus((TextBox)sender, true, Validator.CheckPlz);
             UpdatePlz((TextBox)sender, BillingOrtInput);
         }
+
+        private void DateInput_TextChanged(object sender, RoutedEventArgs evt) {
+            InputTextChanged((TextBox)sender, true, Validator.CheckDate);
+        }
     }
 }