diff --git a/services/notificationService.js b/services/notificationService.js
index bbc5d8c..ebdaf85 100644
--- a/services/notificationService.js
+++ b/services/notificationService.js
@@ -28,8 +28,7 @@ async function sendNtfyNotification(adminNtfy, userNtfy, payload) {
   const server = (userNtfy.serverUrl || adminNtfy.serverUrl || 'https://ntfy.sh').replace(/\/+$/, '');
   const sanitizedPrefix = (adminNtfy.topicPrefix || '').replace(/^-+|-+$/g, '');
   const sanitizedTopic = (userNtfy.topic || '').replace(/^-+|-+$/g, '');
-  const separator = sanitizedPrefix && sanitizedTopic ? '_' : '';
-  const topic = `${sanitizedPrefix}${separator}${sanitizedTopic}` || sanitizedPrefix || sanitizedTopic;
+  const topic = `${sanitizedPrefix}${sanitizedTopic}` || sanitizedPrefix || sanitizedTopic;
   let url = `${server}/${topic}`;
   if (payload.title) {
     const delimiter = url.includes('?') ? '&' : '?';
diff --git a/src/App.js b/src/App.js
index 3edcd97..daebe9c 100644
--- a/src/App.js
+++ b/src/App.js
@@ -575,8 +575,7 @@ function App() {
       return null;
     }
     const prefix = (notificationCapabilities.ntfy.topicPrefix || '').replace(/^-+|-+$/g, '');
-    const separator = prefix && sanitizedTopic ? '_' : '';
-    const slug = `${prefix}${separator}${sanitizedTopic}` || sanitizedTopic || prefix;
+    const slug = `${prefix}${sanitizedTopic}` || sanitizedTopic || prefix;
     if (!slug) {
       return null;
     }
diff --git a/src/components/NotificationPanel.js b/src/components/NotificationPanel.js
index 153405e..fddcc50 100644
--- a/src/components/NotificationPanel.js
+++ b/src/components/NotificationPanel.js
@@ -72,6 +72,16 @@ const NotificationPanel = ({
                   disabled={!settings.ntfy.enabled}
                 />
               </div>
+              {capabilities.ntfy.serverUrl && (
+                <p className="text-xs text-gray-500">
+                  Server: {capabilities.ntfy.serverUrl} (vom Admin festgelegt)
+                </p>
+              )}
+              {capabilities.ntfy.topicPrefix && (
+                <p className="text-xs text-gray-500">
+                  Präfix: {capabilities.ntfy.topicPrefix} (Topic wird direkt angehängt)
+                </p>
+              )}
               {ntfyPreviewUrl && (
                 <div className="flex items-center gap-2 text-xs text-gray-600">
                   <a