diff --git a/openslides/participant/templates/participant/group_overview.html b/openslides/participant/templates/participant/group_overview.html
index a0f5186bb..8bcbf46c1 100644
--- a/openslides/participant/templates/participant/group_overview.html
+++ b/openslides/participant/templates/participant/group_overview.html
@@ -17,7 +17,7 @@
         <tr class="{% cycle '' 'odd' %}">
             <td><a href="{% model_url group 'view' %}">{{ group.name }}</a></td>
             <td><a href="{% url user_group_edit group.id %}"><img src="{% static 'images/icons/edit.png' %}" title="{% trans 'Edit group' %}"></a>
-            {% if group.name != 'Anonymous' %}
+            {% if group.name|lower != 'anonymous' %}
             <a href="{% url user_group_delete group.id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Delete group' %}"></a>
             {% endif %}
             </td>
diff --git a/openslides/participant/views.py b/openslides/participant/views.py
index 5b1097295..b4be8b998 100644
--- a/openslides/participant/views.py
+++ b/openslides/participant/views.py
@@ -209,7 +209,7 @@ class UserDeleteView(DeleteView):
         if self.get_object() == self.request.user:
             messages.error(request, _("You can not delete yourself."))
         else:
-            super(DeleteView, self).pre_redirect(request, *args, **kwargs)
+            super(UserDeleteView, self).pre_redirect(request, *args, **kwargs)
 
 class SetUserStatusView(RedirectView, SingleObjectMixin):
     """
@@ -442,6 +442,12 @@ class GroupDeleteView(DeleteView):
     model = Group
     url = 'user_group_overview'
 
+    def pre_redirect(self, request, *args, **kwargs):
+        if self.get_object().name.lower() == 'anonymous':
+            messages.error(request, _("You can not delete this Group."))
+        else:
+            super(GroupDeleteView, self).pre_redirect(request, *args, **kwargs)
+
 
 class Config(FormView):
     """