diff --git a/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java b/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
index 147aefa..6cbad26 100644
--- a/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
+++ b/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
@@ -231,6 +231,9 @@ public class Controller {
 
     int i = cache.getStationen().indexOf(station);
 
+    if (i == 0) {
+      return ResponseEntity.status(400).body("The scanned station isn´t the correct following station");
+    }
 
     if (cache.getStationen().get(i - 1).equals(aktuelleStation)) {
       bearbeitet.setAktuelleStation(station);
@@ -398,7 +401,7 @@ public class Controller {
   }
 
   @RequestMapping("/api/hello")
-  public ResponseEntity hello(@RequestParam String name){
+  public ResponseEntity hello(@RequestParam String name) {
     return ResponseEntity.status(200).body(userRepository.getRankingPlaceFromUser(name));
   }
 }