diff --git a/server/controllers/article/edit.php b/server/controllers/article/edit.php
index b91ba489..51ab4dc5 100755
--- a/server/controllers/article/edit.php
+++ b/server/controllers/article/edit.php
@@ -55,7 +55,7 @@ class EditArticleController extends Controller {
             if (!$newArticleTopic->isNull()) {
                 $article->topic = $newArticleTopic;
             } else {
-                Response::respondError(ERRORS::INVALID_TOPIC);
+                throw new RequestException(ERRORS::INVALID_TOPIC);
                 return;
             }
         }
diff --git a/server/controllers/staff/add.php b/server/controllers/staff/add.php
index d11c7b5e..df2b1baa 100755
--- a/server/controllers/staff/add.php
+++ b/server/controllers/staff/add.php
@@ -97,7 +97,7 @@ class AddStaffController extends Controller {
             return;
         }
 
-        Response::respondError(ERRORS::ALREADY_A_STAFF);
+        throw new RequestException(ERRORS::ALREADY_A_STAFF);
     }
 
     public function storeRequestData() {
diff --git a/server/controllers/staff/assign-ticket.php b/server/controllers/staff/assign-ticket.php
index febc65d5..1e270740 100755
--- a/server/controllers/staff/assign-ticket.php
+++ b/server/controllers/staff/assign-ticket.php
@@ -54,22 +54,22 @@ class AssignStaffController extends Controller {
             $this->staffToAssign = Staff::getDataStore($staffId, 'id');
 
             if($this->staffToAssign->isNull()) {
-                throw new Exception(ERRORS::INVALID_STAFF);
+                throw new RequestException(ERRORS::INVALID_STAFF);
             }
 
             if(!$this->staffToAssign->sharedDepartmentList->includesId($this->ticket->department->id)) {
-                throw new Exception(ERRORS::INVALID_DEPARTMENT);
+                throw new RequestException(ERRORS::INVALID_DEPARTMENT);
             }
         } else {
             $this->staffToAssign = Controller::getLoggedUser();
         }
 
         if($this->ticket->owner) {
-            throw new Exception(ERRORS::TICKET_ALREADY_ASSIGNED);
+            throw new RequestException(ERRORS::TICKET_ALREADY_ASSIGNED);
         }
 
         if(!$this->ticketHasStaffDepartment())  {
-            throw new Exception(ERRORS::INVALID_DEPARTMENT);
+            throw new RequestException(ERRORS::INVALID_DEPARTMENT);
         } else {
             $this->staffToAssign->sharedTicketList->add($this->ticket);
             $this->ticket->owner = $this->staffToAssign;
diff --git a/server/controllers/staff/delete.php b/server/controllers/staff/delete.php
index 033d19a7..8f454861 100755
--- a/server/controllers/staff/delete.php
+++ b/server/controllers/staff/delete.php
@@ -46,7 +46,7 @@ class DeleteStaffController extends Controller {
         $staff = Staff::getDataStore($staffId);
 
         if($staffId === Controller::getLoggedUser()->id) {
-            Response::respondError(ERRORS::INVALID_STAFF);
+            throw new RequestException(ERRORS::INVALID_STAFF);
             return;
         }
 
diff --git a/server/controllers/staff/edit.php b/server/controllers/staff/edit.php
index 77ae9b48..e3b1f2f7 100755
--- a/server/controllers/staff/edit.php
+++ b/server/controllers/staff/edit.php
@@ -63,11 +63,11 @@ class EditStaffController extends Controller {
             $this->staffInstance = Staff::getDataStore($staffId, 'id');
 
             if($this->staffInstance->isNull()) {
-                Response::respondError(ERRORS::INVALID_STAFF);
+                throw new RequestException(ERRORS::INVALID_STAFF);
                 return;
             }
         } else {
-            Response::respondError(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
             return;
         }
 
diff --git a/server/controllers/staff/un-assign-ticket.php b/server/controllers/staff/un-assign-ticket.php
index a162d4d4..92f6de9e 100755
--- a/server/controllers/staff/un-assign-ticket.php
+++ b/server/controllers/staff/un-assign-ticket.php
@@ -65,7 +65,7 @@ class UnAssignStaffController extends Controller {
             $ticket->store();
             Response::respondSuccess();
         } else {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
     }
 }
diff --git a/server/controllers/system/add-api-key.php b/server/controllers/system/add-api-key.php
index 62477979..c9944058 100755
--- a/server/controllers/system/add-api-key.php
+++ b/server/controllers/system/add-api-key.php
@@ -57,7 +57,7 @@ class AddAPIKeyController extends Controller {
             $apiInstance->store();
             Response::respondSuccess($token);
         } else {
-            Response::respondError(ERRORS::NAME_ALREADY_USED);
+            throw new RequestException(ERRORS::NAME_ALREADY_USED);
         }
 
     }
diff --git a/server/controllers/system/check-requirements.php b/server/controllers/system/check-requirements.php
index 4e732c5c..e5509f5e 100755
--- a/server/controllers/system/check-requirements.php
+++ b/server/controllers/system/check-requirements.php
@@ -31,7 +31,7 @@ class CheckRequirementsController extends Controller {
 
     public function handler() {
         if(InstallationDoneController::isInstallationDone()) {
-          throw new Exception(ERRORS::INIT_SETTINGS_DONE);
+          throw new RequestException(ERRORS::INIT_SETTINGS_DONE);
         }
 
         Response::respondSuccess([
diff --git a/server/controllers/system/csv-import.php b/server/controllers/system/csv-import.php
index 8a348a3e..51f5f7ca 100755
--- a/server/controllers/system/csv-import.php
+++ b/server/controllers/system/csv-import.php
@@ -36,7 +36,7 @@ class CSVImportController extends Controller {
         $fileUploader = $this->uploadFile(true);
 
         if(!$fileUploader instanceof FileUploader) {
-            throw new Exception(ERRORS::INVALID_FILE);
+            throw new RequestException(ERRORS::INVALID_FILE);
         }
 
         $file = fopen($fileUploader->getFullFilePath(),'r');
diff --git a/server/controllers/system/delete-all-users.php b/server/controllers/system/delete-all-users.php
index db8c83b1..7b1e4bea 100755
--- a/server/controllers/system/delete-all-users.php
+++ b/server/controllers/system/delete-all-users.php
@@ -37,7 +37,7 @@ class DeleteAllUsersController extends Controller {
         $password = Controller::request('password');
 
         if(!Hashing::verifyPassword($password, Controller::getLoggedUser()->password)) {
-            Response::respondError(ERRORS::INVALID_PASSWORD);
+            throw new RequestException(ERRORS::INVALID_PASSWORD);
             return;
         }
 
diff --git a/server/controllers/system/delete-api-key.php b/server/controllers/system/delete-api-key.php
index 43b179e6..e4c6b272 100755
--- a/server/controllers/system/delete-api-key.php
+++ b/server/controllers/system/delete-api-key.php
@@ -44,7 +44,7 @@ class DeleteAPIKeyController extends Controller {
         $keyInstance = APIKey::getDataStore($name, 'name');
         
         if($keyInstance->isNull()) {
-            Response::respondError(ERRORS::INVALID_NAME);
+            throw new RequestException(ERRORS::INVALID_NAME);
             return;
         }
 
diff --git a/server/controllers/system/delete-department.php b/server/controllers/system/delete-department.php
index 0c44792d..9808c5fb 100755
--- a/server/controllers/system/delete-department.php
+++ b/server/controllers/system/delete-department.php
@@ -53,7 +53,7 @@ class DeleteDepartmentController extends Controller {
         $this->transferDepartmentId = Controller::request('transferDepartmentId');
 
         if ($this->departmentId === $this->transferDepartmentId) {
-            Response::respondError(ERRORS::SAME_DEPARTMENT);
+            throw new RequestException(ERRORS::SAME_DEPARTMENT);
             return;
         }
 
diff --git a/server/controllers/system/disable-registration.php b/server/controllers/system/disable-registration.php
index 777bb461..7c7b0dba 100755
--- a/server/controllers/system/disable-registration.php
+++ b/server/controllers/system/disable-registration.php
@@ -36,7 +36,7 @@ class DisableRegistrationController extends Controller {
         $password = Controller::request('password');
 
         if(!Hashing::verifyPassword($password, Controller::getLoggedUser()->password)) {
-            Response::respondError(ERRORS::INVALID_PASSWORD);
+            throw new RequestException(ERRORS::INVALID_PASSWORD);
             return;
         }
 
diff --git a/server/controllers/system/disable-user-system.php b/server/controllers/system/disable-user-system.php
index f3b5cfd3..c9dd1396 100755
--- a/server/controllers/system/disable-user-system.php
+++ b/server/controllers/system/disable-user-system.php
@@ -37,12 +37,12 @@ class DisableUserSystemController extends Controller {
         $password = Controller::request('password');
 
         if(!Hashing::verifyPassword($password, Controller::getLoggedUser()->password)) {
-            throw new Exception(ERRORS::INVALID_PASSWORD);
+            throw new RequestException(ERRORS::INVALID_PASSWORD);
 
         }
 
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::SYSTEM_USER_IS_ALREADY_DISABLED);
+            throw new RequestException(ERRORS::SYSTEM_USER_IS_ALREADY_DISABLED);
         }
 
         $userSystemEnabled = Setting::getSetting('user-system-enabled');
diff --git a/server/controllers/system/edit-mail-template.php b/server/controllers/system/edit-mail-template.php
index b452cccb..b7a187e3 100755
--- a/server/controllers/system/edit-mail-template.php
+++ b/server/controllers/system/edit-mail-template.php
@@ -74,7 +74,7 @@ class EditMailTemplateController extends Controller {
         $mailTemplate = MailTemplate::findOne(' language = ? AND template = ?', [$this->language, $this->templateType]);
 
         if($mailTemplate->isNull()) {
-            throw new Exception(ERRORS::INVALID_TEMPLATE);
+            throw new RequestException(ERRORS::INVALID_TEMPLATE);
         }
 
         $this->validateReplacements();
@@ -96,21 +96,21 @@ class EditMailTemplateController extends Controller {
             $this->getReplacementStrings($originalText[1]),
             $this->getReplacementStrings($this->texts[0])
         )) {
-            throw new Exception(ERRORS::INVALID_TEXT_1);
+            throw new RequestException(ERRORS::INVALID_TEXT_1);
         }
 
         if(!$this->includes(
             $this->getReplacementStrings($originalText[2]),
             $this->getReplacementStrings($this->texts[1])
         )) {
-            throw new Exception(ERRORS::INVALID_TEXT_2);
+            throw new RequestException(ERRORS::INVALID_TEXT_2);
         }
 
         if(!$this->includes(
             $this->getReplacementStrings($originalText[3]),
             $this->getReplacementStrings($this->texts[2])
         )) {
-            throw new Exception(ERRORS::INVALID_TEXT_3);
+            throw new RequestException(ERRORS::INVALID_TEXT_3);
         }
     }
 
diff --git a/server/controllers/system/edit-settings.php b/server/controllers/system/edit-settings.php
index 51157fa7..16b73f58 100755
--- a/server/controllers/system/edit-settings.php
+++ b/server/controllers/system/edit-settings.php
@@ -75,7 +75,7 @@ class EditSettingsController extends Controller {
         $supported = json_decode(Controller::request('supportedLanguages'));
 
         if (array_diff($supported, $allowed)) {
-            throw new Exception(ERRORS::INVALID_SUPPORTED_LANGUAGES);
+            throw new RequestException(ERRORS::INVALID_SUPPORTED_LANGUAGES);
         }
 
         foreach(Language::LANGUAGES as $languageCode) {
diff --git a/server/controllers/system/enable-registration.php b/server/controllers/system/enable-registration.php
index 7f568d48..b7228e12 100755
--- a/server/controllers/system/enable-registration.php
+++ b/server/controllers/system/enable-registration.php
@@ -37,7 +37,7 @@ class EnableRegistrationController extends Controller {
         $password = Controller::request('password');
 
         if(!Hashing::verifyPassword($password,Controller::getLoggedUser()->password)) {
-            Response::respondError(ERRORS::INVALID_PASSWORD);
+            throw new RequestException(ERRORS::INVALID_PASSWORD);
             return;
         }
 
diff --git a/server/controllers/system/enable-user-system.php b/server/controllers/system/enable-user-system.php
index 22cc4237..3b86de96 100755
--- a/server/controllers/system/enable-user-system.php
+++ b/server/controllers/system/enable-user-system.php
@@ -37,12 +37,12 @@ class EnableUserSystemController extends Controller {
         $password = Controller::request('password');
 
         if(!Hashing::verifyPassword($password, Controller::getLoggedUser()->password)) {
-            throw new Exception(ERRORS::INVALID_PASSWORD);
+            throw new RequestException(ERRORS::INVALID_PASSWORD);
 
         }
 
         if(Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::SYSTEM_USER_IS_ALREADY_ENABLED);
+            throw new RequestException(ERRORS::SYSTEM_USER_IS_ALREADY_ENABLED);
         }
 
         $userSystemEnabled = Setting::getSetting('user-system-enabled');
diff --git a/server/controllers/system/get-mail-template.php b/server/controllers/system/get-mail-template.php
index 86b63e6a..689c2d9b 100755
--- a/server/controllers/system/get-mail-template.php
+++ b/server/controllers/system/get-mail-template.php
@@ -49,7 +49,7 @@ class GetMailTemplateController extends Controller {
         $mailTemplate = MailTemplate::findOne(' language = ? AND template = ?', [$language, $type]);
 
         if($mailTemplate->isNull()) {
-            throw new Exception(ERRORS::INVALID_TEMPLATE);
+            throw new RequestException(ERRORS::INVALID_TEMPLATE);
         }
 
         Response::respondSuccess($mailTemplate->toArray());
diff --git a/server/controllers/system/get-stats.php b/server/controllers/system/get-stats.php
index 4f432cbb..8c400f4a 100755
--- a/server/controllers/system/get-stats.php
+++ b/server/controllers/system/get-stats.php
@@ -48,7 +48,7 @@ class GetStatsController extends Controller {
 
         if($staffId) {
             if($staffId !== Controller::getLoggedUser()->id && !Controller::isStaffLogged(3)) {
-                Response::respondError(ERRORS::NO_PERMISSION);
+                throw new RequestException(ERRORS::NO_PERMISSION);
                 return;
             }
 
diff --git a/server/controllers/system/init-admin.php b/server/controllers/system/init-admin.php
index 7e61d2bb..edc4c5aa 100755
--- a/server/controllers/system/init-admin.php
+++ b/server/controllers/system/init-admin.php
@@ -53,7 +53,7 @@ class InitAdminController extends Controller {
 
     public function handler() {
         if(!Staff::isTableEmpty()) {
-            throw new Exception(ERRORS::INIT_SETTINGS_DONE);
+            throw new RequestException(ERRORS::INIT_SETTINGS_DONE);
         }
 
         $staff = new Staff();
diff --git a/server/controllers/system/init-database.php b/server/controllers/system/init-database.php
index 3d5a8793..95ae640b 100755
--- a/server/controllers/system/init-database.php
+++ b/server/controllers/system/init-database.php
@@ -40,7 +40,7 @@ class InitDatabaseController extends Controller {
 
     public function handler() {
         if(defined('MYSQL_HOST')) {
-            throw new Exception(ERRORS::INIT_SETTINGS_DONE);
+            throw new RequestException(ERRORS::INIT_SETTINGS_DONE);
         }
 
         $dbHost = Controller::request('dbHost');
@@ -56,7 +56,7 @@ class InitDatabaseController extends Controller {
             RedBean::selectDatabase($dbName);
 
             if(!RedBean::testConnection()) {
-                throw new Exception(ERRORS::DATABASE_CONNECTION);
+                throw new RequestException(ERRORS::DATABASE_CONNECTION);
             }
         } else {
             $dbName = 'opensupports_' . Hashing::generateRandomNumber(100, 999);
@@ -65,7 +65,7 @@ class InitDatabaseController extends Controller {
             RedBean::selectDatabase($dbName);
 
             if(!RedBean::testConnection()) {
-                throw new Exception(ERRORS::DATABASE_CREATION);
+                throw new RequestException(ERRORS::DATABASE_CREATION);
             }
         }
 
diff --git a/server/controllers/system/init-settings.php b/server/controllers/system/init-settings.php
index a0d468cb..91e7f58a 100755
--- a/server/controllers/system/init-settings.php
+++ b/server/controllers/system/init-settings.php
@@ -59,7 +59,7 @@ class InitSettingsController extends Controller {
 
             Response::respondSuccess();
         } else {
-            Response::respondError(ERRORS::INIT_SETTINGS_DONE);
+            throw new RequestException(ERRORS::INIT_SETTINGS_DONE);
         }
     }
 
diff --git a/server/controllers/system/recover-mail-template.php b/server/controllers/system/recover-mail-template.php
index 8768d7e9..2dd90ead 100755
--- a/server/controllers/system/recover-mail-template.php
+++ b/server/controllers/system/recover-mail-template.php
@@ -51,7 +51,7 @@ class RecoverMailTemplateController extends Controller {
         $mailTemplate = MailTemplate::findOne(' language = ? AND template = ?', [$language, $templateType]);
 
         if($mailTemplate->isNull()) {
-            throw new Exception(ERRORS::INVALID_TEMPLATE);
+            throw new RequestException(ERRORS::INVALID_TEMPLATE);
         }
 
         $mailTexts = MailTexts::getTexts()[$language][$templateType];
diff --git a/server/controllers/system/test-smtp.php b/server/controllers/system/test-smtp.php
index 1bd3921b..18318678 100644
--- a/server/controllers/system/test-smtp.php
+++ b/server/controllers/system/test-smtp.php
@@ -48,7 +48,7 @@ class TestSMTPController extends Controller {
         if($mailSender->isConnected()) {
             Response::respondSuccess();
         } else {
-            throw new Exception(ERRORS::SMTP_CONNECTION);
+            throw new RequestException(ERRORS::SMTP_CONNECTION);
         }
     }
 }
diff --git a/server/controllers/ticket/change-department.php b/server/controllers/ticket/change-department.php
index 47021b06..b934bbe4 100755
--- a/server/controllers/ticket/change-department.php
+++ b/server/controllers/ticket/change-department.php
@@ -53,7 +53,7 @@ class ChangeDepartmentController extends Controller {
         $user = Controller::getLoggedUser();
 
         if($ticket->owner && $ticket->owner->id !== $user->id && $user->level == 1){
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         $event = Ticketevent::getEvent(Ticketevent::DEPARTMENT_CHANGED);
diff --git a/server/controllers/ticket/change-priority.php b/server/controllers/ticket/change-priority.php
index ac7d47b0..f0bd0718 100755
--- a/server/controllers/ticket/change-priority.php
+++ b/server/controllers/ticket/change-priority.php
@@ -65,7 +65,7 @@ class ChangePriorityController extends Controller {
             Log::createLog('PRIORITY_CHANGED', $ticket->ticketNumber);
             Response::respondSuccess();
         } else {
-            Response::respondError(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
     }
diff --git a/server/controllers/ticket/check.php b/server/controllers/ticket/check.php
index 59f1dd8b..e896291b 100755
--- a/server/controllers/ticket/check.php
+++ b/server/controllers/ticket/check.php
@@ -55,7 +55,7 @@ class CheckTicketController extends Controller {
 
     public function handler() {
         if (Controller::isUserSystemEnabled() || Controller::isStaffLogged()) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         $email = Controller::request('email');
@@ -70,7 +70,7 @@ class CheckTicketController extends Controller {
                 'ticketNumber' => $ticket->ticketNumber
             ]);
         } else {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
     }
 }
\ No newline at end of file
diff --git a/server/controllers/ticket/close.php b/server/controllers/ticket/close.php
index 9cacd543..f76de9c5 100755
--- a/server/controllers/ticket/close.php
+++ b/server/controllers/ticket/close.php
@@ -67,7 +67,7 @@ class CloseController extends Controller {
           !$this->ticket->isOwner(Controller::getLoggedUser()) &&
           !$this->ticket->isAuthor(Controller::getLoggedUser())
         ) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         $this->markAsUnread();
diff --git a/server/controllers/ticket/comment.php b/server/controllers/ticket/comment.php
index 7be2b248..24841505 100755
--- a/server/controllers/ticket/comment.php
+++ b/server/controllers/ticket/comment.php
@@ -83,7 +83,7 @@ class CommentController extends Controller {
         $isOwner = $this->ticket->isOwner(Controller::getLoggedUser());
 
         if((Controller::isUserSystemEnabled() || Controller::isStaffLogged()) && !$isOwner && !$isAuthor) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         $this->storeComment();
diff --git a/server/controllers/ticket/delete.php b/server/controllers/ticket/delete.php
index ee35d34c..766b2d3f 100644
--- a/server/controllers/ticket/delete.php
+++ b/server/controllers/ticket/delete.php
@@ -45,15 +45,15 @@ class DeleteController extends Controller {
         $ticketAuthor = $ticket->authorToArray();
 
         if($ticket->owner) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         if(Controller::isStaffLogged() && $user->level < 3) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         if(!Controller::isStaffLogged() && ($user->email !== $ticketAuthor['email'] || $ticketAuthor['staff'])) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         $ticket->delete();
diff --git a/server/controllers/ticket/get.php b/server/controllers/ticket/get.php
index 6bc30d2a..24410fb3 100755
--- a/server/controllers/ticket/get.php
+++ b/server/controllers/ticket/get.php
@@ -65,7 +65,7 @@ class TicketGetController extends Controller {
 
         if(Controller::isUserSystemEnabled() || Controller::isStaffLogged()) {
             if ($this->shouldDenyPermission()) {
-                throw new Exception(ERRORS::NO_PERMISSION);
+                throw new RequestException(ERRORS::NO_PERMISSION);
             } else {
                 Response::respondSuccess($this->ticket->toArray());
             }
diff --git a/server/controllers/ticket/re-open.php b/server/controllers/ticket/re-open.php
index e7956cff..194575a5 100755
--- a/server/controllers/ticket/re-open.php
+++ b/server/controllers/ticket/re-open.php
@@ -44,7 +44,7 @@ class ReOpenController extends Controller {
         $this->ticket = Ticket::getByTicketNumber(Controller::request('ticketNumber'));
 
         if($this->shouldDenyPermission()) {
-            Response::respondError(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
             return;
         }
 
diff --git a/server/controllers/ticket/seen.php b/server/controllers/ticket/seen.php
index 90851994..16ca4b84 100755
--- a/server/controllers/ticket/seen.php
+++ b/server/controllers/ticket/seen.php
@@ -45,7 +45,7 @@ class SeenController extends Controller {
         $ticket = Ticket::getByTicketNumber($ticketnumber);
 
         if(!$ticket->isOwner($user) && !$ticket->isAuthor($user)) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         if ($ticket->isOwner($user)) {
diff --git a/server/controllers/user/ban.php b/server/controllers/user/ban.php
index c769070e..bf53cefb 100755
--- a/server/controllers/user/ban.php
+++ b/server/controllers/user/ban.php
@@ -55,7 +55,7 @@ class BanUserController extends Controller {
 
             Response::respondSuccess();
         } else {
-            Response::respondError(ERRORS::ALREADY_BANNED);
+            throw new RequestException(ERRORS::ALREADY_BANNED);
         }
     }
 }
\ No newline at end of file
diff --git a/server/controllers/user/delete.php b/server/controllers/user/delete.php
index ee24df2e..43f7cec9 100755
--- a/server/controllers/user/delete.php
+++ b/server/controllers/user/delete.php
@@ -44,7 +44,7 @@ class DeleteUserController extends Controller {
 
     public function handler() {
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
         
         $userId = Controller::request('userId');
diff --git a/server/controllers/user/disable.php b/server/controllers/user/disable.php
index f135e81b..9caa45ac 100644
--- a/server/controllers/user/disable.php
+++ b/server/controllers/user/disable.php
@@ -41,7 +41,7 @@ class DisableUserController extends Controller {
     public function handler() {
         $user = User::getDataStore(Controller::request('userId'));
         if($user->disabled) {
-            throw new Exception(ERRORS::ALREADY_DISABLED);
+            throw new RequestException(ERRORS::ALREADY_DISABLED);
         }
 
         $user->disabled = 1;
diff --git a/server/controllers/user/edit-password.php b/server/controllers/user/edit-password.php
index ef46c8b7..b98dd0ea 100755
--- a/server/controllers/user/edit-password.php
+++ b/server/controllers/user/edit-password.php
@@ -58,7 +58,7 @@ class EditPassword extends Controller {
             
             Response::respondSuccess();
         } else{
-            Response::respondError(ERRORS::INVALID_OLD_PASSWORD);
+            throw new RequestException(ERRORS::INVALID_OLD_PASSWORD);
         }
     }
 }
\ No newline at end of file
diff --git a/server/controllers/user/enable.php b/server/controllers/user/enable.php
index d870970a..9993cc06 100644
--- a/server/controllers/user/enable.php
+++ b/server/controllers/user/enable.php
@@ -42,7 +42,7 @@ class EnableUserController extends Controller {
         $user = User::getDataStore(Controller::request('userId'));
 
         if(!$user->disabled) {
-            throw new Exception(ERRORS::ALREADY_ENABLED);
+            throw new RequestException(ERRORS::ALREADY_ENABLED);
         }
 
         $user->disabled = 0;
diff --git a/server/controllers/user/get-user.php b/server/controllers/user/get-user.php
index de56b46b..5544ac1e 100755
--- a/server/controllers/user/get-user.php
+++ b/server/controllers/user/get-user.php
@@ -47,7 +47,7 @@ class GetUserByIdController extends Controller {
 
     public function handler() {
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
 
         $userId = Controller::request('userId');
diff --git a/server/controllers/user/get-users.php b/server/controllers/user/get-users.php
index b709206e..48fe46b1 100755
--- a/server/controllers/user/get-users.php
+++ b/server/controllers/user/get-users.php
@@ -54,7 +54,7 @@ class GetUsersController extends Controller {
 
     public function handler() {
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
 
         $userList = $this->getUserList();
diff --git a/server/controllers/user/get.php b/server/controllers/user/get.php
index a7f8126f..754132ba 100755
--- a/server/controllers/user/get.php
+++ b/server/controllers/user/get.php
@@ -39,7 +39,7 @@ class GetUserController extends Controller {
 
     public function handler() {
         if (Controller::isStaffLogged()) {
-            Response::respondError(ERRORS::INVALID_CREDENTIALS);
+            throw new RequestException(ERRORS::INVALID_CREDENTIALS);
             return;
         }
 
diff --git a/server/controllers/user/login.php b/server/controllers/user/login.php
index 6b289775..12afce5b 100755
--- a/server/controllers/user/login.php
+++ b/server/controllers/user/login.php
@@ -51,22 +51,22 @@ class LoginController extends Controller {
 
     public function handler() {
         if(!Controller::isUserSystemEnabled() && !Controller::request('staff')) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
 
         if ($this->isAlreadyLoggedIn()) {
-            throw new Exception(ERRORS::SESSION_EXISTS);
+            throw new RequestException(ERRORS::SESSION_EXISTS);
         }
 
         $this->clearOldRememberTokens();
 
         if ($this->checkInputCredentials() || $this->checkRememberToken()) {
             if($this->userInstance->verificationToken !== null) {
-                throw new Exception(ERRORS::UNVERIFIED_USER);
+                throw new RequestException(ERRORS::UNVERIFIED_USER);
             }
 
             if($this->userInstance->disabled) {
-                throw new Exception(ERRORS::USER_DISABLED);
+                throw new RequestException(ERRORS::USER_DISABLED);
             }
 
             $this->createUserSession();
@@ -78,7 +78,7 @@ class LoginController extends Controller {
 
             Response::respondSuccess($this->getUserData());
         } else {
-            throw new Exception(ERRORS::INVALID_CREDENTIALS);
+            throw new RequestException(ERRORS::INVALID_CREDENTIALS);
         }
     }
 
diff --git a/server/controllers/user/recover-password.php b/server/controllers/user/recover-password.php
index 59f83430..612f0ae2 100755
--- a/server/controllers/user/recover-password.php
+++ b/server/controllers/user/recover-password.php
@@ -57,7 +57,7 @@ class RecoverPasswordController extends Controller {
 
     public function handler() {
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
 
         $this->requestData();
@@ -90,7 +90,7 @@ class RecoverPasswordController extends Controller {
             $this->sendMail();
             Response::respondSuccess(['staff' => $recoverPassword->staff]);
         } else {
-            Response::respondError(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
     }
     public function sendMail() {
diff --git a/server/controllers/user/send-recover-password.php b/server/controllers/user/send-recover-password.php
index 1f075c52..4ee26bf7 100755
--- a/server/controllers/user/send-recover-password.php
+++ b/server/controllers/user/send-recover-password.php
@@ -50,7 +50,7 @@ class SendRecoverPasswordController extends Controller {
 
     public function handler() {
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
 
         $this->staff = Controller::request('staff');
@@ -77,7 +77,7 @@ class SendRecoverPasswordController extends Controller {
 
             Response::respondSuccess();
         } else {
-            Response::respondError(ERRORS::INVALID_EMAIL);
+            throw new RequestException(ERRORS::INVALID_EMAIL);
         }
     }
 
diff --git a/server/controllers/user/signup.php b/server/controllers/user/signup.php
index b9815888..196f420e 100755
--- a/server/controllers/user/signup.php
+++ b/server/controllers/user/signup.php
@@ -80,7 +80,7 @@ class SignUpController extends Controller {
 
     public function handler() {
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
 
         $this->storeRequestData();
@@ -89,16 +89,16 @@ class SignUpController extends Controller {
         $existentUser = User::getUser($this->userEmail, 'email');
 
         if (!$existentUser->isNull()) {
-            throw new Exception(ERRORS::USER_EXISTS);
+            throw new RequestException(ERRORS::USER_EXISTS);
         }
         $banRow = Ban::getDataStore($this->userEmail,'email');
 
         if (!$banRow->isNull()) {
-            throw new Exception(ERRORS::ALREADY_BANNED);
+            throw new RequestException(ERRORS::ALREADY_BANNED);
         }
 
         if (!Setting::getSetting('registration')->value && $apiKey->isNull() && !Controller::isStaffLogged(2) && !$this->csvImported) {
-            throw new Exception(ERRORS::NO_PERMISSION);
+            throw new RequestException(ERRORS::NO_PERMISSION);
         }
 
         $userId = $this->createNewUserAndRetrieveId();
diff --git a/server/controllers/user/un-ban.php b/server/controllers/user/un-ban.php
index 3d66e18e..033f9e41 100755
--- a/server/controllers/user/un-ban.php
+++ b/server/controllers/user/un-ban.php
@@ -43,7 +43,7 @@ class UnBanUserController extends Controller {
         $banRow = Ban::getDataStore($email,'email');
         
         if($banRow->isNull()) {
-            Response::respondError(ERRORS::INVALID_EMAIL);
+            throw new RequestException(ERRORS::INVALID_EMAIL);
         } else {
             $banRow->delete();
             
diff --git a/server/controllers/user/verify.php b/server/controllers/user/verify.php
index b6981e00..204a3244 100755
--- a/server/controllers/user/verify.php
+++ b/server/controllers/user/verify.php
@@ -42,7 +42,7 @@ class VerifyController extends Controller{
 
     public function handler() {
         if(!Controller::isUserSystemEnabled()) {
-            throw new Exception(ERRORS::USER_SYSTEM_DISABLED);
+            throw new RequestException(ERRORS::USER_SYSTEM_DISABLED);
         }
 
         $email = Controller::request('email');
@@ -51,11 +51,11 @@ class VerifyController extends Controller{
         $userRow = User::getDataStore($email, 'email');
 
         if(!$userRow) {
-            throw new Exception(ERRORS::INVALID_EMAIL);
+            throw new RequestException(ERRORS::INVALID_EMAIL);
         }
 
         if($userRow->verificationToken !== $token) {
-            throw new Exception(ERRORS::INVALID_TOKEN);
+            throw new RequestException(ERRORS::INVALID_TOKEN);
         }
 
         $userRow->verificationToken = null;
diff --git a/server/libs/Controller.php b/server/libs/Controller.php
index 85f8809a..a3472bfa 100755
--- a/server/libs/Controller.php
+++ b/server/libs/Controller.php
@@ -110,7 +110,7 @@ abstract class Controller {
             $allImagesValidSize = $allImagesValidSize && $fileUploader->isSizeValid($_FILES["image_$i"]);
         }
 
-        if(!$allImagesValidSize) throw new Exception(ERRORS::INVALID_FILE);
+        if(!$allImagesValidSize) throw new RequestException(ERRORS::INVALID_FILE);
 
         $imagePaths = [];
         $url = Setting::getSetting('url')->getValue();
@@ -137,7 +137,7 @@ abstract class Controller {
 
             return $fileUploader;
         } else {
-            throw new Exception(ERRORS::INVALID_FILE);
+            throw new RequestException(ERRORS::INVALID_FILE);
         }
     }
 
diff --git a/server/libs/RequestException.php b/server/libs/RequestException.php
new file mode 100644
index 00000000..540eae80
--- /dev/null
+++ b/server/libs/RequestException.php
@@ -0,0 +1,2 @@
+<?php 
+class RequestException extends Exception {}
diff --git a/server/libs/Validator.php b/server/libs/Validator.php
index 0f107c9a..a2ebc031 100755
--- a/server/libs/Validator.php
+++ b/server/libs/Validator.php
@@ -1,7 +1,9 @@
 <?php
+include_once 'libs/RequestException.php';
+
 use Respect\Validation\Validator as DataValidator;
 
-class ValidationException extends Exception {}
+class ValidationException extends RequestException {}
 
 class Validator {