diff --git a/source/development/index.rst b/source/development/index.rst
index c07ce0fbb..f521ef369 100644
--- a/source/development/index.rst
+++ b/source/development/index.rst
@@ -28,6 +28,7 @@ As Chill rely on the `symfony <http://symfony.com>`_ framework, reading the fram
     Timelines <timelines.rst>
     Exports <exports.rst>
     Testing <make-test-working.rst>
+    Useful snippets <useful-snippets.rst>
     manual/index.rst
 
 Layout and UI
diff --git a/source/development/useful-snippets.rst b/source/development/useful-snippets.rst
new file mode 100644
index 000000000..435790b0f
--- /dev/null
+++ b/source/development/useful-snippets.rst
@@ -0,0 +1,35 @@
+
+
+
+
+Useful snippets
+###############
+
+
+Security
+********
+
+Get the circles a user can reach
+================================
+
+.. code-block:: php
+
+   use Symfony\Component\Security\Core\Role\Role;
+
+   $authorizationHelper = $this->get('chill.main.security.authorization.helper');
+   $circles = $authorizationHelper
+       ->getReachableCircles(
+             $this->getUser(), # from a controller
+             new Role('CHILL_ROLE'), 
+             $center 
+       );
+
+
+Controller
+**********
+
+Secured controller for person
+=============================
+
+.. literalinclude:: useful-snippets/controller-secured-for-person.php
+   :language: php
diff --git a/source/development/useful-snippets/controller-secured-for-person.php b/source/development/useful-snippets/controller-secured-for-person.php
new file mode 100644
index 000000000..501fb46c1
--- /dev/null
+++ b/source/development/useful-snippets/controller-secured-for-person.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace Chill\HealthBundle\Controller;
+
+use Chill\HealthBundle\Security\Authorization\ConsultationVoter;
+use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+use Chill\PersonBundle\Security\Authorization\PersonVoter;
+use Symfony\Component\Security\Core\Role\Role;
+
+class ConsultationController extends Controller
+{
+    /**
+     * 
+     * @param int $id personId
+     * @return \Symfony\Component\HttpFoundation\Response
+     * @throws type
+     */
+    public function listAction($id)
+    {
+        /* @var $person \Chill\PersonBundle\Entity\Person */
+        $person = $this->get('chill.person.repository.person')
+            ->find($id);
+        
+        if ($person === null) {
+            throw $this->createNotFoundException("The person is not found");
+        }
+        
+        $this->denyAccessUnlessGranted(PersonVoter::SEE, $person);
+        
+        /* @var $authorizationHelper \Chill\MainBundle\Security\Authorization\AuthorizationHelper */
+        $authorizationHelper = $this->get('chill.main.security.'
+            . 'authorization.helper');
+        
+        $circles = $authorizationHelper->getReachableCircles(
+            $this->getUser(), 
+            new Role(ConsultationVoter::SEE), 
+            $person->getCenter()
+            );
+        
+        // create a query which take circles into account        
+        $consultations = $this->getDoctrine()->getManager()
+            ->createQuery('SELECT c FROM ChillHealthBundle:Consultation c '
+                . 'WHERE c.patient = :person AND c.circle IN(:circles) '
+                . 'ORDER BY c.date DESC')
+            ->setParameter('person', $person)
+            ->setParameter('circles', $circles)
+            ->getResult();
+        
+        return $this->render('ChillHealthBundle:Consultation:list.html.twig', array(
+                'person' => $person,
+                'consultations' => $consultations
+            ));    
+    }
+}
+