diff --git a/server/controllers/staff/assign-ticket.php b/server/controllers/staff/assign-ticket.php
index e32e44cd..30e3f37d 100644
--- a/server/controllers/staff/assign-ticket.php
+++ b/server/controllers/staff/assign-ticket.php
@@ -34,6 +34,7 @@ class AssignStaffController extends Controller {
         } else {
             $this->user->sharedTicketList->add($this->ticket);
             $this->ticket->owner = $this->user;
+            $this->ticket->unread = true;
             $this->ticket->store();
             $this->user->store();
             
diff --git a/server/controllers/staff/un-assign-ticket.php b/server/controllers/staff/un-assign-ticket.php
index c46f3fe8..4454ef06 100644
--- a/server/controllers/staff/un-assign-ticket.php
+++ b/server/controllers/staff/un-assign-ticket.php
@@ -26,6 +26,7 @@ class UnAssignStaffController extends Controller {
             $user->sharedTicketList->remove($ticket);
             $user->store();
             $ticket->owner = null;
+            $ticket->unread = true;
             $ticket->store();
             Response::respondSuccess();
         } else {
diff --git a/server/controllers/ticket.php b/server/controllers/ticket.php
index 3ac8d015..c11da896 100644
--- a/server/controllers/ticket.php
+++ b/server/controllers/ticket.php
@@ -10,6 +10,7 @@ include 'ticket/change-department.php';
 include 'ticket/close.php';
 include 'ticket/re-open.php';
 include 'ticket/change-priority.php';
+include 'ticket/seen.php';
 
 $ticketControllers = new ControllerGroup();
 $ticketControllers->setGroupPath('/ticket');
@@ -25,5 +26,6 @@ $ticketControllers->addController(new ChangeDepartmentController);
 $ticketControllers->addController(new CloseController);
 $ticketControllers->addController(new ReOpenController);
 $ticketControllers->addController(new ChangePriorityController);
+$ticketControllers->addController(new SeenController);
 
 $ticketControllers->finalize();
\ No newline at end of file
diff --git a/server/controllers/ticket/change-department.php b/server/controllers/ticket/change-department.php
index b291e8a7..bb916826 100644
--- a/server/controllers/ticket/change-department.php
+++ b/server/controllers/ticket/change-department.php
@@ -34,6 +34,7 @@ class ChangeDepartmentController extends Controller {
         }
 
         $ticket->department = $department;
+        $ticket->unread = true;
         $ticket->store();
         Response::respondSuccess();
     }
diff --git a/server/controllers/ticket/change-priority.php b/server/controllers/ticket/change-priority.php
index f00e7812..49d4e3a5 100644
--- a/server/controllers/ticket/change-priority.php
+++ b/server/controllers/ticket/change-priority.php
@@ -28,6 +28,7 @@ class ChangePriorityController extends Controller {
 
         if($ticket->owner && $user->id === $ticket->owner->id) {
             $ticket->priority = $priority;
+            $ticket->unread = true;
             $ticket->store();
             Response::respondSuccess();
         } else {
diff --git a/server/controllers/ticket/close.php b/server/controllers/ticket/close.php
index 5e0b04f5..8e993477 100644
--- a/server/controllers/ticket/close.php
+++ b/server/controllers/ticket/close.php
@@ -31,7 +31,12 @@ class CloseController extends Controller {
             Response::respondError(ERRORS::NO_PERMISSION);
             return;
         }
-
+        
+        if(Controller::isStaffLogged()) {
+            $ticket->unread = true;
+        } else {
+            $ticket->unreadStaff = true;
+        }
         $ticket->closed = true;
         $ticket->store();
         Response::respondSuccess();
diff --git a/server/controllers/ticket/comment.php b/server/controllers/ticket/comment.php
index 83fb5513..2c4b0714 100644
--- a/server/controllers/ticket/comment.php
+++ b/server/controllers/ticket/comment.php
@@ -51,11 +51,11 @@ class CommentController extends Controller {
         ));
 
         if(Controller::isStaffLogged()) {
-            $comment->authorUser = Controller::getLoggedUser();
+            $this->ticket->unread = true;
         } else {
-            $comment->authorUser = Controller::getLoggedUser();
+            $this->ticket->unreadStaff = true;
         }
-
+        $comment->authorUser = Controller::getLoggedUser();
         $this->ticket->addEvent($comment);
         $this->ticket->store();
     }
diff --git a/server/controllers/ticket/create.php b/server/controllers/ticket/create.php
index 64dab1e7..4de927f9 100644
--- a/server/controllers/ticket/create.php
+++ b/server/controllers/ticket/create.php
@@ -58,6 +58,7 @@ class CreateController extends Controller {
             'file' => '',
             'date' => Date::getCurrentDate(),
             'unread' => false,
+            'unreadStaff' => true,
             'closed' => false,
         ));
         
diff --git a/server/controllers/ticket/re-open.php b/server/controllers/ticket/re-open.php
index 0ee2caae..d1332f52 100644
--- a/server/controllers/ticket/re-open.php
+++ b/server/controllers/ticket/re-open.php
@@ -30,7 +30,11 @@ class ReOpenController extends Controller {
             Response::respondError(ERRORS::NO_PERMISSION);
             return;
         }
-
+        if(Controller::isStaffLogged()) {
+            $ticket->unread = true;
+        } else {
+            $ticket->unreadStaff = true;
+        }
         $ticket->closed = false;
         $ticket->store();
         Response::respondSuccess();
diff --git a/server/controllers/ticket/seen.php b/server/controllers/ticket/seen.php
new file mode 100644
index 00000000..fa07e0c4
--- /dev/null
+++ b/server/controllers/ticket/seen.php
@@ -0,0 +1,39 @@
+<?php
+use Respect\Validation\Validator as DataValidator;
+
+class SeenController extends Controller {
+    const PATH = '/seen';
+
+    public function validations() {
+        return [
+            'permission' => 'user',
+            'requestData' => [
+                'ticketNumber' => [
+                    'validation' => DataValidator::validTicketNumber(),
+                    'error' => ERRORS::INVALID_TICKET
+                ]
+            ]
+        ];
+    }
+
+    public function handler() {
+        $ticketnumber = Controller::request('ticketNumber');
+        $user = Controller::getLoggedUser();
+        $ticket = Ticket::getByTicketNumber($ticketnumber);
+        
+        if (Controller::isStaffLogged() && $ticket->owner && $ticket->owner->id === $user->id) {
+            $ticket->unreadStaff = false;
+            $ticket->store();
+            Response::respondSuccess();
+            return;
+        }
+        if (!Controller::isStaffLogged() && $ticket->author && $user->id === $ticket->author->id) {
+            $ticket->unread  = false;
+            $ticket->store();
+            Response::respondSuccess();
+            return;
+        }
+        Response::respondError(ERRORS::NO_PERMISSION);
+        
+    }
+}
\ No newline at end of file
diff --git a/server/models/Ticket.php b/server/models/Ticket.php
index b029b6a4..74f166d2 100644
--- a/server/models/Ticket.php
+++ b/server/models/Ticket.php
@@ -18,7 +18,8 @@ class Ticket extends DataStore {
             'priority',
             'author',
             'owner',
-            'ownTicketeventList'
+            'ownTicketeventList',
+            'unreadStaff'
         );
     }
 
@@ -33,6 +34,8 @@ class Ticket extends DataStore {
     public function getDefaultProps() {
         return array(
             'priority' => 'low',
+            'unread' => false,
+            'unreadStaff' => true,
             'ticketNumber' => $this->generateUniqueTicketNumber()
         );
     }
diff --git a/tests/staff/assign-ticket.rb b/tests/staff/assign-ticket.rb
index 432ad9ca..7baaa09c 100644
--- a/tests/staff/assign-ticket.rb
+++ b/tests/staff/assign-ticket.rb
@@ -22,6 +22,8 @@ describe '/staff/assign-ticket' do
 
         (ticket['owner_id']).should.equal('1')
 
+        (ticket['unread']).should.equal('1')
+
         staff_ticket = $database.getRow('staff_ticket', 1 , 'id')
 
         (staff_ticket['staff_id']).should.equal('1')
diff --git a/tests/staff/un-assign-ticket.rb b/tests/staff/un-assign-ticket.rb
index 6d055872..d0f5fc71 100644
--- a/tests/staff/un-assign-ticket.rb
+++ b/tests/staff/un-assign-ticket.rb
@@ -21,6 +21,7 @@ describe '/staff/un-assign-ticket' do
         ticket = $database.getRow('ticket', 1 , 'id')
 
         (ticket['owner_id']).should.equal(nil)
+        (ticket['unread']).should.equal('1')
 
         staff_ticket = $database.getRow('staff_ticket', 1 , 'id')
 
diff --git a/tests/ticket/change-department.rb b/tests/ticket/change-department.rb
index e7e96b78..0775d999 100644
--- a/tests/ticket/change-department.rb
+++ b/tests/ticket/change-department.rb
@@ -17,6 +17,7 @@ describe '/ticket/change-department' do
         (result['status']).should.equal('success')
 
         ticket = $database.getRow('ticket', 1 , 'id')
+        (ticket['unread']).should.equal('1')
         (ticket['department_id']).should.equal('2')
     end
 end
\ No newline at end of file
diff --git a/tests/ticket/change-priority.rb b/tests/ticket/change-priority.rb
index d33839f9..37ff474c 100644
--- a/tests/ticket/change-priority.rb
+++ b/tests/ticket/change-priority.rb
@@ -18,6 +18,7 @@ describe '/ticket/change-priority' do
 
         ticket = $database.getRow('ticket', 1 , 'id')
         (ticket['priority']).should.equal('high')
+        (ticket['unread']).should.equal('1')
     end
 
     it 'should change priority to medium if everything is okey' do
@@ -34,6 +35,7 @@ describe '/ticket/change-priority' do
 
         ticket = $database.getRow('ticket', 1 , 'id')
         (ticket['priority']).should.equal('medium')
+        (ticket['unread']).should.equal('1')
     end
 
     it 'should change priority to low if everything is okey' do
@@ -50,6 +52,7 @@ describe '/ticket/change-priority' do
 
         ticket = $database.getRow('ticket', 1 , 'id')
         (ticket['priority']).should.equal('low')
+        (ticket['unread']).should.equal('1')
     end
 
 end
\ No newline at end of file
diff --git a/tests/ticket/close.rb b/tests/ticket/close.rb
index ab305ab1..a13b3c5d 100644
--- a/tests/ticket/close.rb
+++ b/tests/ticket/close.rb
@@ -17,6 +17,7 @@ describe '/ticket/close' do
 
         ticket = $database.getRow('ticket', 1 , 'id')
         (ticket['closed']).should.equal('1')
+        (ticket['unread']).should.equal('1')
 
     end
 end
\ No newline at end of file
diff --git a/tests/ticket/comment.rb b/tests/ticket/comment.rb
index c05790cb..27222b87 100644
--- a/tests/ticket/comment.rb
+++ b/tests/ticket/comment.rb
@@ -72,6 +72,7 @@ describe '/ticket/comment/' do
         (comment['content']).should.equal('some comment content')
         (comment['type']).should.equal('COMMENT')
         (comment['author_user_id']).should.equal($csrf_userid)
+        (ticket['unread_staff']).should.equal('1')
     end
 
     it 'should fail if user is not the author nor owner' do
diff --git a/tests/ticket/re-open.rb b/tests/ticket/re-open.rb
index 2cacfbbd..43bd3867 100644
--- a/tests/ticket/re-open.rb
+++ b/tests/ticket/re-open.rb
@@ -17,6 +17,7 @@ describe '/ticket/re-open' do
 
         ticket = $database.getRow('ticket', 1 , 'id')
         (ticket['closed']).should.equal('0')
+        (ticket['unread']).should.equal('1')
 
     end
 end
\ No newline at end of file
diff --git a/tests/ticket/seen.rb b/tests/ticket/seen.rb
new file mode 100644
index 00000000..9cff88bc
--- /dev/null
+++ b/tests/ticket/seen.rb
@@ -0,0 +1,39 @@
+describe '/ticket/seen' do
+
+    describe 'when a staff is logged' do
+        request('/user/logout')
+        Scripts.login($staff[:email], $staff[:password], true)
+
+        it 'should change unread if everything is okey ' do
+            ticket = $database.getRow('ticket', 1, 'id')
+            result = request('/ticket/seen', {
+                        ticketNumber: ticket['ticket_number'],
+                        csrf_userid: $csrf_userid,
+                        csrf_token: $csrf_token
+                    })
+            (result['status']).should.equal('success')
+            ticket = $database.getRow('ticket', 1, 'id')
+            (ticket['unreadStaff']).should.equal('0')
+
+        end
+    end
+
+    describe 'when a user is logged' do
+
+        request('/user/logout')
+        Scripts.login()
+        it 'should change unread if everything is okey ' do
+            ticket = $database.getRow('ticket', 1, 'id')
+            result = request('/ticket/seen', {
+                ticketNumber: ticket['ticket_number'],
+                csrf_userid: $csrf_userid,
+                csrf_token: $csrf_token
+            })
+
+            (result['status']).should.equal('success')
+            ticket = $database.getRow('ticket', 1, 'id')
+            (ticket['unread']).should.equal('0')
+        end
+    end
+
+end
\ No newline at end of file