diff --git a/payment_webhook.php b/payment_webhook.php
index b7dfa04..8f47775 100644
--- a/payment_webhook.php
+++ b/payment_webhook.php
@@ -26,10 +26,12 @@ foreach ($_SERVER as $key => $value) {
     }
 }
 
-// Letzte Zustellung roh ablegen (logs/ ist per .htaccess gesperrt) -- fuer die Fehlersuche
-// an der Signaturpruefung. Enthaelt keine Zugangsdaten.
-@\file_put_contents(__DIR__ . '/logs/webhook_last_' . \preg_replace('/[^a-z0-9_]/', '', $module) . '.json',
-    \json_encode(['time' => \date('c'), 'headers' => $headers, 'body' => $rawBody], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
+// Letzte Zustellung roh ablegen -- nur wenn logs/webhook_debug existiert (Fehlersuche an
+// der Signaturpruefung, 13.09.2026). logs/ ist per .htaccess gesperrt.
+if (\is_file(__DIR__ . '/logs/webhook_debug')) {
+    @\file_put_contents(__DIR__ . '/logs/webhook_last_' . \preg_replace('/[^a-z0-9_]/', '', $module) . '.json',
+        \json_encode(['time' => \date('c'), 'headers' => $headers, 'body' => $rawBody], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
+}
 
 try {
     $status = $provider->onWebhook($headers, $rawBody);