diff --git a/Elwig/Windows/AdministrationWindow.cs b/Elwig/Windows/AdministrationWindow.cs
index 20ed5fb..1b507a6 100644
--- a/Elwig/Windows/AdministrationWindow.cs
+++ b/Elwig/Windows/AdministrationWindow.cs
@@ -82,6 +82,14 @@ namespace Elwig.Windows {
         }
 
         private void OnClosing(object? sender, CancelEventArgs evt) {
+            if ((IsCreating || IsEditing) && HasChanged) {
+                var r = System.Windows.MessageBox.Show("Soll das Fenster wirklich geschlossen werden?", "Schließen bestätigen",
+                    MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
+                if (r != MessageBoxResult.Yes) {
+                    evt.Cancel = true;
+                    return;
+                }
+            }
             IsClosing = true;
         }
 
@@ -293,12 +301,20 @@ namespace Elwig.Windows {
         }
 
         protected bool HasChanged =>
-            !IsValid ||
-            TextBoxInputs.Any(InputHasChanged) ||
-            ComboBoxInputs.Any(InputHasChanged) ||
-            CheckComboBoxInputs.Any(InputHasChanged) ||
-            CheckBoxInputs.Any(InputHasChanged) ||
-            RadioButtonInputs.Any(InputHasChanged);
+            IsEditing && (
+                !IsValid ||
+                TextBoxInputs.Any(InputHasChanged) ||
+                ComboBoxInputs.Any(InputHasChanged) ||
+                CheckComboBoxInputs.Any(InputHasChanged) ||
+                CheckBoxInputs.Any(InputHasChanged) ||
+                RadioButtonInputs.Any(InputHasChanged)
+            ) || IsCreating && (
+                TextBoxInputs.Any(i => InputIsNotDefault(i) || (!i.IsReadOnly && i.Text != "")) ||
+                ComboBoxInputs.Any(i => InputIsNotDefault(i) || (i.IsEnabled && i.SelectedItem != null)) ||
+                CheckComboBoxInputs.Any(i => InputIsNotDefault(i) || i.SelectedItem != null) ||
+                CheckBoxInputs.Any(InputIsNotDefault) ||
+                RadioButtonInputs.Any(InputIsNotDefault)
+            );
 
         protected void UpdatePlz(TextBox plzInput, ComboBox ortInput) {
             var plzInputValid = GetInputValid(plzInput);
diff --git a/Elwig/Windows/DeliveryAdminWindow.xaml.cs b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
index 69b0b58..4ad7986 100644
--- a/Elwig/Windows/DeliveryAdminWindow.xaml.cs
+++ b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
@@ -778,6 +778,12 @@ namespace Elwig.Windows {
         }
 
         private async void CancelCreatingButton_Click(object sender, RoutedEventArgs evt) {
+            if (IsCreating && HasChanged) {
+                var r = MessageBox.Show("Soll der Vorgang wirklich abgebrochen werden?", "Abbrechen bestätigen",
+                    MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
+                if (r != MessageBoxResult.Yes) return;
+            }
+
             ControlUtils.RenewItemsSource(AttributesInput, await Context.WineAttributes.OrderBy(a => a.Name).ToListAsync(), i => (i as WineAttr)?.AttrId);
             ControlUtils.RenewItemsSource(MemberInput, await Context.Members.Where(m => m.IsActive || !IsReceipt).OrderBy(m => m.FamilyName).ThenBy(m => m.GivenName).ToListAsync(), i => (i as Member)?.MgNr);
             if (DeliveryList.SelectedItem is not Delivery d) {