diff --git a/main/badge/assertion.php b/main/badge/assertion.php
index 0380f7ddd9..3de57a6c83 100644
--- a/main/badge/assertion.php
+++ b/main/badge/assertion.php
@@ -11,6 +11,8 @@ require_once '../inc/global.inc.php';
 
 $userId = isset($_GET['user']) ? intval($_GET['user']) : 0;
 $skillId = isset($_GET['skill']) ? intval($_GET['skill']) : 0;
+$courseId = isset($_GET['course']) ? intval($_GET['course']) : 0;
+$sessionId = isset($_GET['session']) ? intval($_GET['session']) : 0;
 
 if ($userId === 0 || $skillId === 0) {
     exit;
@@ -18,12 +20,12 @@ if ($userId === 0 || $skillId === 0) {
 
 $objSkill = new Skill();
 
-if (!$objSkill->user_has_skill($userId, $skillId)) {
+if (!$objSkill->user_has_skill($userId, $skillId, $courseId, $sessionId)) {
     exit;
 }
 
 $objSkillRelUser = new SkillRelUser();
-$userSkill = $objSkillRelUser->getByUserAndSkill($userId, $skillId);
+$userSkill = $objSkillRelUser->getByUserAndSkill($userId, $skillId, $courseId, $sessionId);
 
 if ($userSkill == false) {
     exit;
@@ -42,7 +44,12 @@ $json = array(
     'badge' => api_get_path(WEB_CODE_PATH) . "badge/class.php?id=$skillId",
     'verify' => array(
         'type' => 'hosted',
-        'url' => api_get_path(WEB_CODE_PATH) . "badge/assertion.php?user=$userId&skill=$skillId"
+        'url' => api_get_path(WEB_CODE_PATH) . "badge/assertion.php?" . http_build_query(array(
+            'user' => $userId,
+            'skill' => $skillId,
+            'course' => $courseId,
+            'session' => $sessionId
+        ))
     )
 );
 
diff --git a/main/gradebook/get_badges.php b/main/gradebook/get_badges.php
index db7f716dba..e7f7e0bb79 100644
--- a/main/gradebook/get_badges.php
+++ b/main/gradebook/get_badges.php
@@ -5,18 +5,18 @@
  * @author Angel Fernando Quiroz Campos <angel.quiroz@beeznest.com>
  * @package chamilo.badge
  */
-$cidReset = true;
-
 require_once '../inc/global.inc.php';
 
 $userId = isset($_GET['user']) ? intval($_GET['user']) : 0;
+$courseId = api_get_course_int_id();
+$sessionId = api_get_session_id();
 
 if ($userId === 0) {
     exit;
 }
 
 $objSkillRelUser = new SkillRelUser();
-$userSkills = $objSkillRelUser->get_user_skills($userId);
+$userSkills = $objSkillRelUser->get_user_skills($userId, $courseId, $sessionId);
 
 if (empty($userSkills)) {
     exit;
@@ -27,7 +27,15 @@ $assertions = array();
 foreach ($userSkills as $skill) {
     $skillId = current($skill);
 
-    $assertions[] = api_get_path(WEB_CODE_PATH) . "badge/assertion.php?user=$userId&skill=$skillId";
+    $assertionUrl = api_get_path(WEB_CODE_PATH) . "badge/assertion.php?";
+    $assertionUrl .= http_build_query(array(
+        'user' => $userId,
+        'skill' => $skillId,
+        'course' => $courseId,
+        'session' => $sessionId
+    ));
+
+    $assertions[] = $assertionUrl;
 }
 
 $backpack = 'https://backpack.openbadges.org/';
diff --git a/main/inc/lib/skill.lib.php b/main/inc/lib/skill.lib.php
index 664ceb39cc..2cc17cf436 100755
--- a/main/inc/lib/skill.lib.php
+++ b/main/inc/lib/skill.lib.php
@@ -358,7 +358,7 @@ class SkillRelUser extends Model
         return $users;
     }
 
-    public function get_user_skills($user_id)
+    public function get_user_skills($user_id, $courseId, $sessionId = 0)
     {
         if (empty($user_id)) {
             return array();
@@ -366,7 +366,15 @@ class SkillRelUser extends Model
         $result = Database::select(
             'skill_id',
             $this->table,
-            array('where' => array('user_id = ?' => intval($user_id))),
+            array(
+                'where' => array(
+                    'user_id = ? AND course_id = ? AND session_id = ?' => array(
+                        intval($user_id),
+                        intval($courseId),
+                        intval($sessionId)
+                    )
+                )
+            ),
             'all'
         );
         return $result;
@@ -378,10 +386,15 @@ class SkillRelUser extends Model
      * @param int $skillId The skill id
      * @return array The relation data. Otherwise return false
      */
-    public function getByUserAndSkill($userId, $skillId)
+    public function getByUserAndSkill($userId, $skillId, $courseId, $sessionId = 0)
     {
         $where = array(
-            'user_id = ? AND skill_id = ?' => array($userId, $skillId)
+            'user_id = ? AND skill_id = ? AND course_id = ? AND session_id = ?' => array(
+                intval($userId),
+                intval($skillId),
+                intval($courseId),
+                intval($sessionId)
+            )
         );
 
         return Database::select('*', $this->table, array(
@@ -1002,16 +1015,13 @@ class Skill extends Model
      *
      * @return bool
      */
-    public function user_has_skill($user_id, $skill_id, $courseId = 0, $sessionId = 0)
+    public function user_has_skill($user_id, $skill_id, $courseId, $sessionId = 0)
     {        
-        $courseId = intval($courseId);
-        $sessionId = intval($sessionId);
-
         $whereConditions = array(
-            'user_id = ? ' => $user_id,
-            'AND skill_id = ? ' => $skill_id,
-            'AND course_id = ? ' => $courseId,
-            'AND session_id = ? ' => $sessionId
+            'user_id = ? ' => intval($user_id),
+            'AND skill_id = ? ' => intval($skill_id),
+            'AND course_id = ? ' => intval($courseId),
+            'AND session_id = ? ' => intval($sessionId)
         );
 
         $result = Database::select('COUNT(1) AS qty', $this->table_skill_rel_user, array(