diff --git a/app/Http/Controllers/PreApplicationController.php b/app/Http/Controllers/PreApplicationController.php
index aee23f4..6f29a7f 100644
--- a/app/Http/Controllers/PreApplicationController.php
+++ b/app/Http/Controllers/PreApplicationController.php
@@ -7,6 +7,7 @@ use App\Mail\PreApplicationMail;
 use App\Models\ChaosEvents;
 use App\Models\PreApplications;
 use Illuminate\Http\Request;
+use Illuminate\Support\Carbon;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Mail;
 use Log;
@@ -14,6 +15,20 @@ use Nette\Utils\Random;
 
 class PreApplicationController extends Controller
 {
+
+    private function generateReferenceNumber($eventId, $passportType, $firstName){
+        $reference_number = null;
+
+        $ce = ChaosEvents::find($eventId);
+        $free_reference_number = false;
+        $counter = 1;
+        while(!$free_reference_number){
+            $reference_number = $ce->shortname . strtoupper($passportType) . '-' . strtoupper($firstName[0]) . Carbon::now()->format('ymd') . sprintf("%04d", $counter++);
+            $free_reference_number = !PreApplications::where('reference_number', $reference_number)->exists();
+        }
+        return $reference_number;
+    }
+
     public function send(Request $request){
         $event = $request->input('district_region');
 
@@ -53,20 +68,13 @@ class PreApplicationController extends Controller
             //Log::debug('fn: ' . var_export($fn, true) . ' ln: ' . var_export($ln, true) . ' loc: ' . var_export($loc, true) . '');
 
             if($fn && $ln && $loc){
-
-                $free_reference_number = false;
-                while(!$free_reference_number){
-                    $reference_number = $ce->shortname . '-' . strtoupper($passport_type) . '-' . Random::generate(4, "0-9") . '-' . Random::generate(4, "0-9") . '-' . Random::generate(4, "0-9");
-                    $free_reference_number = !PreApplications::where('reference_number', $reference_number)->exists();
-                }
-
                 try{
                     $pa = new PreApplications();
                     $pa->first_name = $first_name;
                     $pa->last_name = $last_name;
                     $pa->location = $location;
                     $pa->passport_type = $passport_type;
-                    $pa->reference_number = $reference_number;
+                    $pa->reference_number = $this->generateReferenceNumber($event, $passport_type, $first_name);
                     $pa->event_id = $event;
                     $pa->email = $email;
                     $pa->save();
@@ -101,13 +109,7 @@ class PreApplicationController extends Controller
                 $pa->event_id = $request->input('district_region');
                 $pa->email = $request->input('mail');
 
-                $ce = ChaosEvents::find($pa->event_id);
-                $free_reference_number = false;
-                while(!$free_reference_number){
-                    $reference_number = $ce->shortname . '-' . strtoupper($pa->passport_type) . '-' . Random::generate(4, "0-9") . '-' . Random::generate(4, "0-9") . '-' . Random::generate(4, "0-9");
-                    $free_reference_number = !PreApplications::where('reference_number', $reference_number)->exists();
-                }
-                $pa->reference_number = $reference_number;
+                $pa->reference_number = $this->generateReferenceNumber($request->input('district_region'), $request->input('passport_type'), $request->input('first_name'));
 
                 $pa->save();
                 return ["messageStatus" => "success", "errorMessage" => ""];
diff --git a/app/Http/Controllers/WebsiteController.php b/app/Http/Controllers/WebsiteController.php
index 409573c..24358e7 100644
--- a/app/Http/Controllers/WebsiteController.php
+++ b/app/Http/Controllers/WebsiteController.php
@@ -9,19 +9,6 @@ use Illuminate\Support\Facades\Auth;
 class WebsiteController extends Controller
 {
 
-    public function __construct()
-    {
-        $this->setLang($_COOKIE['lang'] ?? 'de');
-    }
-
-    private function setLang($lang)
-    {
-        if (!in_array($lang, ['de', 'en'])) {
-            $lang = 'de';
-        }
-
-        App::setLocale($lang);
-    }
 
     //
     public function index(Request $request)
diff --git a/app/Http/Middleware/SetLocale.php b/app/Http/Middleware/SetLocale.php
new file mode 100644
index 0000000..8c5ef39
--- /dev/null
+++ b/app/Http/Middleware/SetLocale.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\App;
+use Symfony\Component\HttpFoundation\Response;
+
+class SetLocale
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        $lang = $request->cookie('lang', 'de');
+        if (!in_array($lang, ['de', 'en'])) {
+            $lang = 'de';
+        }
+
+        App::setLocale($lang);
+
+        return $next($request);
+    }
+}
diff --git a/app/Mail/PreApplicationMail.php b/app/Mail/PreApplicationMail.php
index 3628247..7fcf45a 100644
--- a/app/Mail/PreApplicationMail.php
+++ b/app/Mail/PreApplicationMail.php
@@ -22,6 +22,7 @@ class PreApplicationMail extends Mailable
     public function __construct(protected App\Models\PreApplications $pa, protected string $lang = 'de')
     {
         //
+        $this->locale($this->lang);
     }
 
     /**
@@ -39,7 +40,6 @@ class PreApplicationMail extends Mailable
      */
     public function content(): Content
     {
-        App::setLocale($this->lang);
         return new Content(
             view: 'mail.preapplication',
             with: ['pa' => $this->pa],
@@ -53,13 +53,21 @@ class PreApplicationMail extends Mailable
      */
     public function attachments(): array
     {
-        $lang = match (App::getLocale()) {
+        $langFb = match ($this->locale) {
             'de' => 'dk',
             'en' => 'ek',
             default => 'dk',
         };
+
+        $langDonation = match ($this->locale) {
+            'de' => '',
+            'en' => '_en',
+        };
+
         return [
-            Attachment::fromPath(public_path('Dokumente/c3gov_fb5' . $lang . '.pdf'))
+            Attachment::fromPath(public_path('Dokumente/c3gov_fb5' . $langFb . '.pdf'))
+            ->withMime('application/pdf'),
+            Attachment::fromPath(public_path('Dokumente/C3GovSpGV' . $langDonation . '.pdf'))
             ->withMime('application/pdf'),
         ];
     }
diff --git a/bootstrap/app.php b/bootstrap/app.php
index c183276..95b6d22 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -11,7 +11,7 @@ return Application::configure(basePath: dirname(__DIR__))
         health: '/up',
     )
     ->withMiddleware(function (Middleware $middleware): void {
-        //
+        $middleware->append(\App\Http\Middleware\SetLocale::class);
     })
     ->withExceptions(function (Exceptions $exceptions): void {
         //
diff --git a/composer.json b/composer.json
index fa83919..c869916 100644
--- a/composer.json
+++ b/composer.json
@@ -48,6 +48,11 @@
             "Composer\\Config::disableProcessTimeout",
             "npx concurrently -c \"#93c5fd,#c4b5fd,#fb7185,#fdba74\" \"php artisan serve\" \"php artisan queue:listen --tries=1 --timeout=0\" \"php artisan pail --timeout=0\" \"npm run dev\" --names=server,queue,logs,vite --kill-others"
         ],
+        "dev-bind": [
+            "Composer\\Config::disableProcessTimeout",
+            "npx concurrently -c \"#93c5fd,#c4b5fd,#fb7185,#fdba74\" \"php artisan serve --host=0.0.0.0\" \"php artisan queue:listen --tries=1 --timeout=0\" \"php artisan pail --timeout=0\" \"npm run dev\" --names=server,queue,logs,vite --kill-others"
+        ],
+
         "test": [
             "@php artisan config:clear --ansi",
             "@php artisan test"
diff --git a/lang/de/mail.php b/lang/de/mail.php
index 41d63ec..ecb3125 100644
--- a/lang/de/mail.php
+++ b/lang/de/mail.php
@@ -6,6 +6,7 @@ return [
         'body1' => "Hallo,<br /><br />Ihr Vorantrag wurde erfolgreich eingereicht.<br />Ihre Bearbeitungsnummer lautet: ",
         'body2' => "<br /><br />Folgende Daten wurden übermittelt:<br />",
         'body3' => "<br /><br />Bitte heben Sie diese E-Mail unbedingt auf.<br />Wenn möglich, drucken Sie das Formblatt 5, welches sich im E-Mail-Anhang befindet, aus. Tragen Sie Ihre Bearbeitungsnummer ein und bringen Sie es bei Abholung mit.",
+        'body4' => "<br /><br />Wir bitten ebenfalls um die Beachtung der Spendengebührenverordnung, welche sich ebenfalls im Anhang befindet.",
         'signature' => "Mit freundlichen Grüßen,<br /><br /><br />Ihr C3Gov - Ihr Amt in der Bezirksregion CCC"
     ]
 ];
diff --git a/lang/en/mail.php b/lang/en/mail.php
index 3fd5c9f..8ac5140 100644
--- a/lang/en/mail.php
+++ b/lang/en/mail.php
@@ -6,6 +6,7 @@ return [
         'body1' => "Hello,<br /><br />Your preliminary application has been successfully submitted.<br />Your reference number is:",
         'body2' => "<br /><br />The following data has been submitted:<br />",
         'body3' => "<br /><br />Please keep this email for your records. <br />If possible, print out form 5, which is attached to the email. Fill in your reference number and bring it with you when you pick up your hacker passport.",
+        'body4' => "<br /><br />We also ask you to observe the donation regulation, which is also attached.",
         'signature' => "Sincerely,<br /><br /><br />Your C3Gov – Your office in the CCC district region"
     ]
 ];
diff --git a/resources/views/mail/preapplication.blade.php b/resources/views/mail/preapplication.blade.php
index aa3a8c5..703dde5 100644
--- a/resources/views/mail/preapplication.blade.php
+++ b/resources/views/mail/preapplication.blade.php
@@ -4,5 +4,7 @@
 {{ __('app.preapplication.firstname') }}: {{ $pa->first_name }}<br />
 {{ __('app.preapplication.lastname') }}: {{ $pa->last_name }}<br />
 {{ __('app.preapplication.location') }}: {{ $pa->location }}<br />
-{!! __('mail.preapplication.body3') !!}<br /><br />
+{!! __('mail.preapplication.body3') !!}
+{!! __('mail.preapplication.body4') !!}
+<br /><br />
 {!! __('mail.preapplication.signature') !!}