diff --git a/Controller/TaskController.php b/Controller/TaskController.php
index a24fa9ce9..a54964574 100644
--- a/Controller/TaskController.php
+++ b/Controller/TaskController.php
@@ -11,6 +11,11 @@ use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Annotation\Route;
 use Symfony\Component\Translation\TranslatorInterface;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Chill\TaskBundle\Event\UI\UIEvent;
+use Chill\TaskBundle\Entity\AbstractTask;
+use Symfony\Component\Form\Extension\Core\Type\SubmitType;
+use Symfony\Component\Workflow\Transition;
 
 
 class TaskController extends Controller
@@ -41,7 +46,8 @@ class TaskController extends Controller
         Registry $registry,
         EntityManagerInterface $em,
         Request $request,
-        TranslatorInterface $translator
+        TranslatorInterface $translator,
+        EventDispatcherInterface $eventDispatcher
     ) {
         switch ($kind) {
             case 'single-task':
@@ -49,9 +55,12 @@ class TaskController extends Controller
                     ->find($taskId)
                     ;
                 $defaultReturnPath = $this->generateUrl(
-                    'chill_task_singletask_list',
-                    [ 'person_id' => $task->getPerson() ]
-                    );
+                    'chill_task_single_task_show',
+                    [ 
+                        'id' => $task->getId(),
+                        'list_params' => $request->query->get('list_params', [])
+                    ]);
+                $defaultTemplate = '@ChillTask/SingleTask/transition.html.twig';
                 break;
             default:
                 return new Response("The type '$kind' is not implemented",
@@ -59,27 +68,75 @@ class TaskController extends Controller
         }
 
         if (NULL === $task) {
-            $this->createNotFoundException("task with id '$taskId' and type "
+            throw $this->createNotFoundException("task with id '$taskId' and type "
                 . "'$type' does not exists");
         }
+        
+        $workflow = $registry->get($task);
+        
+        if (!$workflow->can($task, $transition)) {
+            throw $this->createAccessDeniedException('You are not allowed to apply this transition');
+        }
+        $transitionInstance = \array_values( // array_values needed to reset keys (array_filter preserves keys)
+            \array_filter(
+                        $workflow->getEnabledTransitions($task), 
+                        function(Transition $t) use ($transition) {
+                            return $t->getName() === $transition;
+                        }
+                     ))[0];
 
         // we simply check that the user can see the task. Other ACL checks
         // should be performed using `guard` events.
         $this->denyAccessUnlessGranted(TaskVoter::SHOW, $task);
+        
+        $form = $this->createTransitionForm($task);
+        
+        $form->handleRequest($request);
+        
+        if ($form->isSubmitted() && $form->isValid()) {
 
-        $workflow = $registry->get($task);
+            if ($workflow->can($task, $transition)) {
+                $workflow->apply($task, $transition);
 
-        if ($workflow->can($task, $transition)) {
-            $workflow->apply($task, $transition);
+                $em->flush();
 
-            $em->flush();
-
-            $this->addFlash('success', $translator->trans('The transition is successfully applied'));
+                $this->addFlash('success', $translator->trans('The transition is successfully applied'));
 
+            } else {
+                $this->addFlash('error', $translator->trans('The transition could not be applied'));
+            }
+            
+            return $this->redirect($defaultReturnPath);
         } else {
-            $this->addFlash('error', $translator->trans('The transition could not be applied'));
+            $event = (new UIEvent($kind, $task))
+                ->setForm($form)
+                ->setTransition($transitionInstance)
+                ;
+            
+            $eventDispatcher->dispatch(UIEvent::SHOW_TRANSITION_PAGE, $event);
+            
+            if ($event->hasResponse()) {
+                return $event->getResponse();
+            } else {
+                return $this->render($defaultTemplate, [
+                    'task' => $task,
+                    'form' => $form->createView(),
+                    'transition' => $transitionInstance
+                ]);
+            }
         }
-
-        return $this->redirect($request->query->get('return_path', $defaultReturnPath));
+    }
+    
+    /**
+     * 
+     * @param \Chill\TaskBundle\Controller\AbstractTask $task
+     * @return \Symfony\Component\Form\FormInterface
+     */
+    protected function createTransitionForm(AbstractTask $task)
+    {
+        $builder = $this->createFormBuilder($task);
+        $builder->add('submit', SubmitType::class);
+        
+        return $builder->getForm();
     }
 }
diff --git a/Event/UI/UIEvent.php b/Event/UI/UIEvent.php
new file mode 100644
index 000000000..201c3a265
--- /dev/null
+++ b/Event/UI/UIEvent.php
@@ -0,0 +1,130 @@
+<?php
+/*
+ * 
+ */
+namespace Chill\TaskBundle\Event\UI;
+
+use Symfony\Component\EventDispatcher\Event;
+use Symfony\Component\HttpFoundation\Response;
+use Chill\TaskBundle\Entity\AbstractTask;
+use Symfony\Component\Form\FormInterface;
+use Symfony\Component\Workflow\Transition;
+
+/**
+ * 
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class UIEvent extends Event
+{
+    const SHOW_TRANSITION_PAGE = 'chill_task.show_transition_page';
+    
+    /**
+     *
+     * @var string
+     */
+    protected $kind;
+    
+    /**
+     *
+     * @var AbstractTask 
+     */
+    protected $task;
+    
+    /**
+     *
+     * @var Response|null
+     */
+    protected $response = null;
+    
+    /**
+     *
+     * @var FormInterface|null
+     */
+    protected $form = null;
+    
+    /**
+     * @var Transition
+     */
+    protected $transition = null;
+    
+    public function __construct($kind, AbstractTask $task)
+    {
+        $this->kind = $kind;
+        $this->task = $task;
+    }
+    
+    /**
+     * 
+     * @return string
+     */
+    public function getKind()
+    {
+        return $this->kind;
+    }
+
+    /**
+     * 
+     * @return AbstractTask
+     */
+    public function getTask(): AbstractTask
+    {
+        return $this->task;
+    }
+    
+    /**
+     * 
+     * @return FormInterface|null
+     */
+    public function getForm()
+    {
+        return $this->form;
+    }
+
+    public function setForm(FormInterface $form)
+    {
+        $this->form = $form;
+        
+        return $this;
+    }
+    
+    public function getTransition()
+    {
+        return $this->transition;
+    }
+
+    public function setTransition(Transition $transition)
+    {
+        $this->transition = $transition;
+        
+        return $this;
+    }
+        
+    /**
+     * 
+     * @return Response
+     */
+    public function getResponse(): Response
+    {
+        return $this->response;
+    }
+
+    /**
+     * 
+     * @param Response $response
+     * @return $this
+     */
+    public function setResponse(Response $response)
+    {
+        $this->response = $response;
+        
+        return $this;
+    }
+
+    public function hasResponse()
+    {
+        return $this->response instanceof Response;
+    }
+
+
+}
diff --git a/Resources/translations/messages.fr.yml b/Resources/translations/messages.fr.yml
index e13e07bda..3ec1f10eb 100644
--- a/Resources/translations/messages.fr.yml
+++ b/Resources/translations/messages.fr.yml
@@ -60,7 +60,7 @@ Associated person: Personne associée
 Default task: Tâche par défaut
 
 
-# transitions
+# transitions - default task definition
 'new': 'nouvelle'
 'in_progress': 'en cours'
 'closed': 'fermée'
@@ -68,10 +68,16 @@ Default task: Tâche par défaut
 start: démarrer
 close: clotûrer
 cancel: annuler
+Start_verb: Démarrer
+Close_verb: Clotûrer
+Set this task to cancel state: Marquer cette tâche comme annulée
 '%user% has closed the task': %user% a fermé la tâche
 '%user% has canceled the task': %user% a annulé la tâche
 '%user% has started the task': %user% a commencé la tâche
 '%user% has created the task': %user% a introduit la tâche
+Are you sure you want to close this task ?: Êtes-vous sûrs de vouloir clotûrer cette tâche ?
+Are you sure you want to cancel this task ?: Êtes-vous sûrs de vouloir annuler cette tâche ?
+Are you sure you want to start this task ?: Êtes-vous sûrs de vouloir démarrer cette tâche ?
 
 #Flash messages
 'The task is created': 'La tâche a été créée'
@@ -88,4 +94,7 @@ cancel: annuler
 
 #title
 My tasks near deadline: Mes tâches à échéance proche
-My tasks over deadline: Mes tâches à échéance dépassée
\ No newline at end of file
+My tasks over deadline: Mes tâches à échéance dépassée
+
+#transition page
+Apply transition on task <em>%title%</em>: Appliquer la transition sur la tâche <em>%title%</em>
diff --git a/Resources/views/SingleTask/_list.html.twig b/Resources/views/SingleTask/_list.html.twig
index dadf6e248..28b3ddc8b 100644
--- a/Resources/views/SingleTask/_list.html.twig
+++ b/Resources/views/SingleTask/_list.html.twig
@@ -18,7 +18,7 @@
                     {% for task in tasks %}
                         <tr>
                             <td>{{ task.title }}</td>
-                            <td>{{ task_workflow_metadata(task, 'definition.name') }}</td>
+                            <td>{{ task_workflow_metadata(task, 'definition.name')|trans }}</td>
                             {% if person is null %}
                             <td><a href="{{ path('chill_person_view', {person_id : task.person.Id}) }}">{{ task.person}}</a></td>
                             {% endif %}
@@ -58,7 +58,7 @@
                                             <a href="" class="sc-button bt-task-exchange">&nbsp;</a>
                                             <div class="bt-dropdown-content">
                                                 {% for transition in workflow_transitions(task) %}
-                                                    <a href="{{ path('chill_task_task_transition', { 'taskId': task.id, 'transition': transition.name, 'kind': 'single-task', 'return_path':  app.request.uri }) }}" class="{{ task_workflow_metadata(task, 'transition.class', transition)|e('html_attr') }}">{{ task_workflow_metadata(task, 'transition.verb', transition)|trans }}</a>
+                                                    <a href="{{ path('chill_task_task_transition', { 'taskId': task.id, 'transition': transition.name, 'kind': 'single-task', 'list_params': app.request.query.all }) }}" class="{{ task_workflow_metadata(task, 'transition.class', transition)|e('html_attr') }}">{{ task_workflow_metadata(task, 'transition.verb', transition)|trans }}</a>
                                                 {% endfor %}
                                             </div>
                                         </div>
@@ -141,7 +141,7 @@
 {% import _self as helper %}
 
 
-    <h1>{{ app.request.query.get('title', null)|default('Task list'|trans) }}</h1>
+    <h1>{{ app.request.query.get('title', null)|escape('html')|default('Task list'|trans) }}</h1>
 
     {% if false == app.request.query.boolean('hide_form', false) %}
     <h2>{{ 'Filter the tasks'|trans }}</h2>
diff --git a/Resources/views/SingleTask/transition.html.twig b/Resources/views/SingleTask/transition.html.twig
new file mode 100644
index 000000000..7ba341cd9
--- /dev/null
+++ b/Resources/views/SingleTask/transition.html.twig
@@ -0,0 +1,34 @@
+{% extends "ChillPersonBundle::layout.html.twig"  %}
+
+{% set activeRouteKey = 'chill_task_task_list' %}
+{% set person = task.person %}
+
+{% block title  'Remove task'|trans %}
+
+{% block personcontent %}
+
+<h2>{{ 'Apply transition on task <em>%title%</em>'|trans({ '%title%': task.title } )|raw }}</h2>
+
+
+{% if task_workflow_metadata(task, 'transition.sentence_confirmation', transition) is not empty %}
+    <p class="message-confirm">{{ task_workflow_metadata(task, 'transition.sentence_confirmation', transition)|trans }}</p>
+{% else %}
+    <p>{{ 'Are you sure to apply the transition %name% on this task ?'|trans({ '%name%': task_workflow_metadata(task, 'transition.name', transition)|default(transition.name)|trans }) }}</p>
+{% endif %}
+
+{{ form_start(form) }}
+
+<ul class="record_actions">
+    <li class="cancel">
+        <a href="{{ path('chill_task_singletask_list', app.request.query.get('list_params', { }) ) }}" class="sc-button bt-cancel">
+            {{ 'Back to the list'|trans }}
+        </a>
+    </li>
+    <li>
+        {{ form_widget(form.submit, { 'attr' : { 'class' : "sc-button bt-task-exchange green" }, 'label': task_workflow_metadata(task, 'transition.apply_transition_submit_label', transition)|default('apply')|trans } ) }}
+    </li>
+</ul>
+        
+{{ form_end(form) }}
+
+{% endblock %}
diff --git a/Templating/UI/CountNotificationTask.php b/Templating/UI/CountNotificationTask.php
index a3a6377e2..e53b85fbe 100644
--- a/Templating/UI/CountNotificationTask.php
+++ b/Templating/UI/CountNotificationTask.php
@@ -108,10 +108,16 @@ class CountNotificationTask implements NotificationCounterInterface
         $task = $e->getSubject();
         
         if (NULL !== $task->getAssignee()) {
-            $sumCache = $this->cachePool->getItem($this->getCacheKey($task->getAssignee()));
-            
-            if ($sumCache->isHit()) {
-                $this->cachePool->deleteItem($this->getCacheKey($task->getAssignee()));
+            foreach ([
+                SingleTaskRepository::DATE_STATUS_ENDED,
+                SingleTaskRepository::DATE_STATUS_WARNING
+            ] as $status) {
+                $key = $this->getCacheKey($task->getAssignee(), $status);
+                $sumCache = $this->cachePool->getItem($key);
+
+                if ($sumCache->isHit()) {
+                    $this->cachePool->deleteItem($key);
+                }
             }
         }
     }
diff --git a/Workflow/Definition/DefaultTaskDefinition.php b/Workflow/Definition/DefaultTaskDefinition.php
index 3c9fd677e..292f783c6 100644
--- a/Workflow/Definition/DefaultTaskDefinition.php
+++ b/Workflow/Definition/DefaultTaskDefinition.php
@@ -32,17 +32,23 @@ class DefaultTaskDefinition implements \Chill\TaskBundle\Workflow\TaskWorkflowDe
         'close' => [
             'verb' => 'close',
             'class' => 'sc-button bt-task-label bt-task-close',
-            'sentence' => '%user% has closed the task'
+            'sentence' => '%user% has closed the task',
+            'sentence_confirmation' => 'Are you sure you want to close this task ?',
+            'apply_transition_submit_label' => 'Close_verb'
         ],
         'cancel' => [
             'verb' => 'cancel',
             'class' => 'sc-button bt-task-label bt-task-cancel',
-            'sentence' => '%user% has canceled the task'
+            'sentence' => '%user% has canceled the task',
+            'sentence_confirmation' => 'Are you sure you want to cancel this task ?',
+            'apply_transition_submit_label' => 'Set this task to cancel state'
         ],
         'start' => [
             'verb' => 'start',
             'class' => 'sc-button bt-task-label bt-task-start',
-            'sentence' => '%user% has started the task'
+            'sentence' => '%user% has started the task',
+            'sentence_confirmation' => 'Are you sure you want to start this task ?',
+            'apply_transition_submit_label' => 'Start_verb'
         ]
     ];