diff --git a/home/app/controllers/RegisterController.php b/home/app/controllers/RegisterController.php
index e6fa219..7d158f6 100644
--- a/home/app/controllers/RegisterController.php
+++ b/home/app/controllers/RegisterController.php
@@ -3,7 +3,7 @@ require_once __DIR__ . '/../../core/Controller.php';
 
 class RegisterController extends Controller {
     public function index($urlToken = null) {
-        $token = trim($_GET['token'] ?? $urlToken ?? '');
+        $token = trim($_GET['token'] ?? $_GET['TOKEN'] ?? $urlToken ?? '');
 
         if (empty($token)) {
             $this->view('register', [
@@ -50,7 +50,7 @@ class RegisterController extends Controller {
             exit;
         }
 
-        $token = trim($_POST['token'] ?? '');
+        $token = trim($_POST['token'] ?? $_POST['TOKEN'] ?? '');
         $name = trim($_POST['name'] ?? '');
         $email = trim(strtolower($_POST['email'] ?? ''));
         $password = $_POST['password'] ?? '';
diff --git a/home/app/models/Invitation.php b/home/app/models/Invitation.php
index 4935947..b64942b 100644
--- a/home/app/models/Invitation.php
+++ b/home/app/models/Invitation.php
@@ -24,7 +24,7 @@ class Invitation {
     }
 
     public function getByToken(string $token): ?array {
-        $sql = "SELECT * FROM home_invitations WHERE token = :token";
+        $sql = "SELECT * FROM home_invitations WHERE LOWER(token) = LOWER(:token)";
         $this->db->query($sql);
         $this->db->bind(':token', $token);
         $invitation = $this->db->single();
@@ -52,7 +52,7 @@ class Invitation {
     }
 
     public function recordUse(string $token): bool {
-        $sql = "UPDATE home_invitations SET uses_count = uses_count + 1 WHERE token = :token";
+        $sql = "UPDATE home_invitations SET uses_count = uses_count + 1 WHERE LOWER(token) = LOWER(:token)";
         $this->db->query($sql);
         $this->db->bind(':token', $token);
         return $this->db->execute();
diff --git a/home/core/Router.php b/home/core/Router.php
index 5628397..7e1414b 100644
--- a/home/core/Router.php
+++ b/home/core/Router.php
@@ -7,19 +7,25 @@ class Router {
     public function route() {
         $url = $this->parseUrl();
         $controllerPath = __DIR__ . '/../app/controllers/';
-        // Controller Check
-        if (isset($url[0]) && file_exists($controllerPath . ucfirst($url[0]) . 'Controller.php')) {
-            $this->controller = ucfirst($url[0]) . 'Controller';
-            unset($url[0]);
+        // Controller Check (Case-insensitive)
+        if (isset($url[0])) {
+            $candidate = ucfirst(strtolower($url[0])) . 'Controller';
+            if (file_exists($controllerPath . $candidate . '.php')) {
+                $this->controller = $candidate;
+                unset($url[0]);
+            }
         }
         require_once $controllerPath . $this->controller . '.php';
         $this->controller = new $this->controller;
-        // Method Check
+        // Method Check (Case-insensitive)
         if (isset($url[1])) {
             $candidateMethod = $url[1];
-            if (is_callable([$this->controller, $candidateMethod]) && strpos($candidateMethod, '_') !== 0) {
-                $this->method = $candidateMethod;
-                unset($url[1]);
+            foreach (get_class_methods($this->controller) as $methodName) {
+                if (strcasecmp($methodName, $candidateMethod) === 0 && strpos($methodName, '_') !== 0) {
+                    $this->method = $methodName;
+                    unset($url[1]);
+                    break;
+                }
             }
         }
         // Params & Execution