diff --git a/application/core/FHC_Controller.php b/application/core/FHC_Controller.php
index f6f138441..815c03da2 100644
--- a/application/core/FHC_Controller.php
+++ b/application/core/FHC_Controller.php
@@ -4,6 +4,10 @@ if (! defined('BASEPATH')) exit('No direct script access allowed');
 
 class FHC_Controller extends CI_Controller
 {
+	const FHC_CONTROLLER_ID = 'fhc_controller_id'; // name of the parameter used to identify uniquely a call to a controller
+
+	private $_controllerId; // contains the unique identifier of a call to a controller
+
 	/**
 	 * Standard construct for all the controllers, loads the authentication system
 	 */
@@ -11,6 +15,8 @@ class FHC_Controller extends CI_Controller
 	{
         parent::__construct();
 
+		$this->_controllerId = null; // set _controllerId as null by default
+
 		$this->load->helper('fhcauth');
 	}
 
@@ -23,4 +29,34 @@ class FHC_Controller extends CI_Controller
 	{
 		$this->load->library('PhrasesLib', array($categories, $language), 'p');
 	}
+
+	/**
+	 * Sets the unique id for the called controller
+	 * NOTE: it is only working with HTTP GET request, not neeaded with POST
+	 *		because the first call to the controller is via HTTP GET,
+	 *		therefore a fhc_controller_id is already generated
+	 */
+	protected function setControllerId()
+	{
+		if ($_SERVER['REQUEST_METHOD'] === 'GET')
+		{
+			$this->_controllerId = $this->input->get(self::FHC_CONTROLLER_ID);
+
+			if (!isset($this->_controllerId) || empty($this->_controllerId))
+			{
+				$this->_controllerId = uniqid(); // generate a unique id
+				// Redirect to the same URL, but giving FHC_CONTROLLER_ID as HTTP GET parameter
+				header(sprintf('Location: %s?%s=%s', $_SERVER['REQUEST_URI'], self::FHC_CONTROLLER_ID, $this->_controllerId));
+				exit; // terminate immediately the execution of this controller
+			}
+		}
+	}
+
+	/**
+	 * Return the value of the property _controllerId
+	 */
+	protected function getControllerId()
+	{
+		return $this->_controllerId;
+	}
 }