diff --git a/docs/developers/notifications.md b/docs/developers/notifications.md
index 421d8a0d..fb00574f 100644
--- a/docs/developers/notifications.md
+++ b/docs/developers/notifications.md
@@ -14,6 +14,7 @@ namespace App\Controller;
 use App\Controller\BaseController;
 use App\Entity\Ticket;
 use App\Repository\TicketRepository;
+use App\Utils\ConstraintErrorsFormatter;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
@@ -44,7 +45,7 @@ class TicketsController extends BaseController
 
         $errors = $validator->validate($ticket);
         if (count($errors) > 0) {
-            $error = implode(' ', $this->formatErrors($errors));
+            $error = implode(' ', ConstraintErrorsFormatter::format($errors));
             $this->addFlash('error', $error);
             return $this->redirectToRoute('ticket', [
                 'uid' => $ticket->getUid(),
diff --git a/src/Controller/BaseController.php b/src/Controller/BaseController.php
index dd041b90..2723b137 100644
--- a/src/Controller/BaseController.php
+++ b/src/Controller/BaseController.php
@@ -9,7 +9,6 @@
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
-use Symfony\Component\Validator\ConstraintViolationListInterface;
 
 class BaseController extends AbstractController
 {
@@ -27,26 +26,6 @@ protected function renderBadRequest(string $view, array $parameters = [], Respon
         return $this->render($view, $parameters, $response);
     }
 
-    /**
-     * @return array<string, string>
-     */
-    protected function formatErrors(ConstraintViolationListInterface $errors): array
-    {
-        $formattedErrors = [];
-        foreach ($errors as $error) {
-            $property = $error->getPropertyPath();
-            if (isset($formattedErrors[$property])) {
-                $formattedErrors[$property] = implode(
-                    ' ',
-                    [$formattedErrors[$property], $error->getMessage()],
-                );
-            } else {
-                $formattedErrors[$property] = $error->getMessage();
-            }
-        }
-        return $formattedErrors;
-    }
-
     protected function isPathRedirectable(string $path): bool
     {
         $router = $this->container->get('router');
diff --git a/src/Controller/MailboxesController.php b/src/Controller/MailboxesController.php
index b023769b..9ac6e3dc 100644
--- a/src/Controller/MailboxesController.php
+++ b/src/Controller/MailboxesController.php
@@ -13,6 +13,7 @@
 use App\Repository\MailboxEmailRepository;
 use App\Security\Encryptor;
 use App\Service\Sorter\MailboxSorter;
+use App\Utils\ConstraintErrorsFormatter;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Messenger\MessageBusInterface;
@@ -135,7 +136,7 @@ public function create(
                 'username' => $username,
                 'password' => $password,
                 'folder' => $folder,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
@@ -236,7 +237,7 @@ public function update(
                 'encryption' => $encryption,
                 'username' => $username,
                 'folder' => $folder,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/Organizations/TicketsController.php b/src/Controller/Organizations/TicketsController.php
index 07652a73..d585f533 100644
--- a/src/Controller/Organizations/TicketsController.php
+++ b/src/Controller/Organizations/TicketsController.php
@@ -18,6 +18,7 @@
 use App\SearchEngine\TicketFilter;
 use App\SearchEngine\TicketSearcher;
 use App\Service\ActorsLister;
+use App\Utils\ConstraintErrorsFormatter;
 use App\Utils\Time;
 use Symfony\Bundle\SecurityBundle\Security;
 use Symfony\Component\HtmlSanitizer\HtmlSanitizerInterface;
@@ -296,7 +297,7 @@ public function create(
                 'priority' => $priority,
                 'allUsers' => $allUsers,
                 'techUsers' => $techUsers,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
@@ -321,7 +322,7 @@ public function create(
                 'priority' => $priority,
                 'allUsers' => $allUsers,
                 'techUsers' => $techUsers,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/OrganizationsController.php b/src/Controller/OrganizationsController.php
index 8148cf24..c1c3681b 100644
--- a/src/Controller/OrganizationsController.php
+++ b/src/Controller/OrganizationsController.php
@@ -9,6 +9,7 @@
 use App\Entity\Organization;
 use App\Repository\OrganizationRepository;
 use App\Service\Sorter\OrganizationSorter;
+use App\Utils\ConstraintErrorsFormatter;
 use App\Utils\Time;
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Component\HttpFoundation\Response;
@@ -138,7 +139,7 @@ public function create(
                 'organizations' => $organizations,
                 'name' => $name,
                 'selectedParentUid' => $selectedParentUid,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
@@ -199,7 +200,7 @@ public function update(
             return $this->renderBadRequest('organizations/edit.html.twig', [
                 'organization' => $organization,
                 'name' => $name,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/PreferencesController.php b/src/Controller/PreferencesController.php
index fe69e4b6..deeaf56c 100644
--- a/src/Controller/PreferencesController.php
+++ b/src/Controller/PreferencesController.php
@@ -7,6 +7,7 @@
 namespace App\Controller;
 
 use App\Repository\UserRepository;
+use App\Utils\ConstraintErrorsFormatter;
 use App\Utils\Locales;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
@@ -71,7 +72,7 @@ public function update(
                 'colorScheme' => $colorScheme,
                 'locale' => $locale,
                 'availableLanguages' => Locales::getSupportedLanguages(),
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/ProfileController.php b/src/Controller/ProfileController.php
index 783f1149..64c7389b 100644
--- a/src/Controller/ProfileController.php
+++ b/src/Controller/ProfileController.php
@@ -7,6 +7,7 @@
 namespace App\Controller;
 
 use App\Repository\UserRepository;
+use App\Utils\ConstraintErrorsFormatter;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\RequestStack;
@@ -91,7 +92,7 @@ public function update(
             return $this->renderBadRequest('profile/edit.html.twig', [
                 'name' => $name,
                 'email' => $email,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/RolesController.php b/src/Controller/RolesController.php
index 89e3fcbd..3c2fd842 100644
--- a/src/Controller/RolesController.php
+++ b/src/Controller/RolesController.php
@@ -9,6 +9,7 @@
 use App\Entity\Role;
 use App\Repository\RoleRepository;
 use App\Service\Sorter\RoleSorter;
+use App\Utils\ConstraintErrorsFormatter;
 use App\Utils\Time;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
@@ -122,7 +123,7 @@ public function create(
                 'name' => $name,
                 'description' => $description,
                 'permissions' => $permissions,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
@@ -217,7 +218,7 @@ public function update(
                 'name' => $name,
                 'description' => $description,
                 'permissions' => $permissions,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/Tickets/MessagesController.php b/src/Controller/Tickets/MessagesController.php
index 94627666..26b24d77 100644
--- a/src/Controller/Tickets/MessagesController.php
+++ b/src/Controller/Tickets/MessagesController.php
@@ -14,6 +14,7 @@
 use App\Repository\OrganizationRepository;
 use App\Repository\TicketRepository;
 use App\Service\TicketTimeline;
+use App\Utils\ConstraintErrorsFormatter;
 use App\Utils\Time;
 use Symfony\Bundle\SecurityBundle\Security;
 use Symfony\Component\HtmlSanitizer\HtmlSanitizerInterface;
@@ -131,7 +132,7 @@ public function create(
                 'statuses' => $statuses,
                 'isSolution' => $isSolution,
                 'isConfidential' => $isConfidential,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
@@ -165,7 +166,7 @@ public function create(
                 'statuses' => $statuses,
                 'isSolution' => $isSolution,
                 'isConfidential' => $isConfidential,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/Tickets/PriorityController.php b/src/Controller/Tickets/PriorityController.php
index 1d8ad450..bb7e491c 100644
--- a/src/Controller/Tickets/PriorityController.php
+++ b/src/Controller/Tickets/PriorityController.php
@@ -9,6 +9,7 @@
 use App\Controller\BaseController;
 use App\Entity\Ticket;
 use App\Repository\TicketRepository;
+use App\Utils\ConstraintErrorsFormatter;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
@@ -89,7 +90,7 @@ public function update(
                 'urgency' => $urgency,
                 'impact' => $impact,
                 'priority' => $priority,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/Tickets/StatusController.php b/src/Controller/Tickets/StatusController.php
index 991b9868..c04eab2a 100644
--- a/src/Controller/Tickets/StatusController.php
+++ b/src/Controller/Tickets/StatusController.php
@@ -9,6 +9,7 @@
 use App\Controller\BaseController;
 use App\Entity\Ticket;
 use App\Repository\TicketRepository;
+use App\Utils\ConstraintErrorsFormatter;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
@@ -82,7 +83,7 @@ public function update(
                 'ticket' => $ticket,
                 'status' => $status,
                 'statuses' => $statuses,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/Tickets/TitleController.php b/src/Controller/Tickets/TitleController.php
index 30cf0744..2173149a 100644
--- a/src/Controller/Tickets/TitleController.php
+++ b/src/Controller/Tickets/TitleController.php
@@ -9,6 +9,7 @@
 use App\Controller\BaseController;
 use App\Entity\Ticket;
 use App\Repository\TicketRepository;
+use App\Utils\ConstraintErrorsFormatter;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
@@ -78,7 +79,7 @@ public function update(
             return $this->renderBadRequest('tickets/title/edit.html.twig', [
                 'ticket' => $ticket,
                 'title' => $title,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Controller/Tickets/TypeController.php b/src/Controller/Tickets/TypeController.php
index 9982d652..4eeec41c 100644
--- a/src/Controller/Tickets/TypeController.php
+++ b/src/Controller/Tickets/TypeController.php
@@ -9,6 +9,7 @@
 use App\Controller\BaseController;
 use App\Entity\Ticket;
 use App\Repository\TicketRepository;
+use App\Utils\ConstraintErrorsFormatter;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
@@ -54,7 +55,7 @@ public function update(
 
         $errors = $validator->validate($ticket);
         if (count($errors) > 0) {
-            $error = implode(' ', $this->formatErrors($errors));
+            $error = implode(' ', ConstraintErrorsFormatter::format($errors));
             $this->addFlash('error', $error);
             return $this->redirectToRoute('ticket', [
                 'uid' => $ticket->getUid(),
diff --git a/src/Controller/UsersController.php b/src/Controller/UsersController.php
index da16c686..083148f2 100644
--- a/src/Controller/UsersController.php
+++ b/src/Controller/UsersController.php
@@ -11,6 +11,7 @@
 use App\Repository\UserRepository;
 use App\Service\Sorter\OrganizationSorter;
 use App\Service\Sorter\UserSorter;
+use App\Utils\ConstraintErrorsFormatter;
 use App\Utils\Time;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
@@ -116,7 +117,7 @@ public function create(
                 'email' => $email,
                 'name' => $name,
                 'organizationUid' => $organizationUid,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
@@ -210,7 +211,7 @@ public function update(
                 'email' => $email,
                 'name' => $name,
                 'organizationUid' => $organizationUid,
-                'errors' => $this->formatErrors($errors),
+                'errors' => ConstraintErrorsFormatter::format($errors),
             ]);
         }
 
diff --git a/src/Utils/ConstraintErrorsFormatter.php b/src/Utils/ConstraintErrorsFormatter.php
new file mode 100644
index 00000000..e654d74b
--- /dev/null
+++ b/src/Utils/ConstraintErrorsFormatter.php
@@ -0,0 +1,38 @@
+<?php
+
+// This file is part of Bileto.
+// Copyright 2022-2023 Probesys
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+namespace App\Utils;
+
+use Symfony\Component\Validator\ConstraintViolationListInterface;
+
+class ConstraintErrorsFormatter
+{
+    /**
+     * Format a list of errors returned by a Validator into a list of errors
+     * displayable in the interface.
+     *
+     * The keys are the properties of the concerned Entity, and the values are
+     * a concatenation of the corresponding error messages.
+     *
+     * @return array<string, string>
+     */
+    public static function format(ConstraintViolationListInterface $errors): array
+    {
+        $formattedErrors = [];
+        foreach ($errors as $error) {
+            $property = $error->getPropertyPath();
+            if (isset($formattedErrors[$property])) {
+                $formattedErrors[$property] = implode(
+                    ' ',
+                    [$formattedErrors[$property], $error->getMessage()],
+                );
+            } else {
+                $formattedErrors[$property] = $error->getMessage();
+            }
+        }
+        return $formattedErrors;
+    }
+}