diff --git a/Elwig/Dialogs/DeleteMemberDialog.xaml.cs b/Elwig/Dialogs/DeleteMemberDialog.xaml.cs
index cdfb7ca..06494bf 100644
--- a/Elwig/Dialogs/DeleteMemberDialog.xaml.cs
+++ b/Elwig/Dialogs/DeleteMemberDialog.xaml.cs
@@ -1,4 +1,5 @@
-using System.Linq;
+using Elwig.Helpers;
+using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
 
@@ -31,13 +32,30 @@ namespace Elwig.Dialogs {
             Update();
         }
 
+        private static void UpdateCheckBox(CheckBox cb) {
+            if (cb.IsEnabled && cb.IsChecked != true) {
+                ControlUtils.SetInputInvalid(cb);
+            } else {
+                ControlUtils.ClearInputState(cb);
+            }
+        }
+
         private void Update() {
             var t = NameInput.Text.ToLower();
+            var nameValid = NameParts.All(t.Contains);
+            UpdateCheckBox(AreaComInput);
+            UpdateCheckBox(DeliveryInput);
+            UpdateCheckBox(PaymentInput);
+            if (!nameValid) {
+                ControlUtils.SetInputInvalid(NameInput);
+            } else {
+                ControlUtils.ClearInputState(NameInput);
+            }
             ConfirmButton.IsEnabled =
                 (!AreaComInput.IsEnabled || DeleteAreaComs) &&
                 (!DeliveryInput.IsEnabled || DeleteDeliveries) &&
                 (!PaymentInput.IsEnabled || DeletePaymentData) &&
-                NameParts.All(t.Contains);
+                nameValid;
         }
 
         private void ConfirmButton_Click(object sender, RoutedEventArgs evt) {