diff --git a/Elwig/Windows/MemberAdminWindow.xaml b/Elwig/Windows/MemberAdminWindow.xaml
index c1de5ee..303e7ba 100644
--- a/Elwig/Windows/MemberAdminWindow.xaml
+++ b/Elwig/Windows/MemberAdminWindow.xaml
@@ -341,6 +341,9 @@
                     <CheckBox x:Name="OrganicInput" Content="Bio" IsEnabled="False"
                               Checked="CheckBox_Changed" Unchecked="CheckBox_Changed"
                               Grid.Column="2" HorizontalAlignment="Left" Margin="10,45,0,0" VerticalAlignment="Top" IsChecked="False"/>
+                    <Button x:Name="OrganicButton" Content="easy-cert.com" Height="25" FontSize="12" IsEnabled="False"
+                            Click="OrganicButton_Click"
+                            Grid.Column="2" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="60,40,0,0"/>
                 </Grid>
             </GroupBox>
             <GroupBox Header="Rechnungsadresse (optional)" Grid.Column="1" Grid.Row="1" Grid.RowSpan="2" Margin="5,5,5,5">
diff --git a/Elwig/Windows/MemberAdminWindow.xaml.cs b/Elwig/Windows/MemberAdminWindow.xaml.cs
index 754c968..944d57c 100644
--- a/Elwig/Windows/MemberAdminWindow.xaml.cs
+++ b/Elwig/Windows/MemberAdminWindow.xaml.cs
@@ -11,6 +11,7 @@ using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore.ChangeTracking;
 using System.Collections.ObjectModel;
 using Elwig.Documents;
+using System.Diagnostics;
 
 namespace Elwig.Windows {
     public partial class MemberAdminWindow : AdministrationWindow {
@@ -187,12 +188,14 @@ namespace Elwig.Windows {
                 DeleteMemberButton.IsEnabled = true;
                 AreaCommitmentButton.IsEnabled = true;
                 DeliveryButton.IsEnabled = true;
+                OrganicButton.IsEnabled = true;
                 FillInputs(m);
             } else {
                 EditMemberButton.IsEnabled = false;
                 DeleteMemberButton.IsEnabled = false;
                 AreaCommitmentButton.IsEnabled = false;
                 DeliveryButton.IsEnabled = false;
+                OrganicButton.IsEnabled = false;
                 ClearOriginalValues();
                 ClearDefaultValues();
                 ClearInputs(validate);
@@ -791,5 +794,17 @@ namespace Elwig.Windows {
                 App.FocusOriginHierarchy();
             }
         }
+
+        private void OrganicButton_Click(object sender, RoutedEventArgs evt) {
+            if (MemberList.SelectedItem is not Member m)
+                return;
+            var url = "https://www.easy-cert.com/htm/suchergebnis.htm?" +
+                //$"CustomerNumber={m.LfbisNr}&" +
+                $"Name={(m.BillingAddress?.Name ?? m.Name).Replace(' ', '+')}&" +
+                $"PostalCode={(m.BillingAddress?.PostalDest ?? m.PostalDest).AtPlz?.Plz}";
+            Process.Start(new ProcessStartInfo(url) {
+                UseShellExecute = true,
+            });
+        }
     }
 }