diff --git a/htdocs/eventorganization/class/conferenceorbooth.class.php b/htdocs/eventorganization/class/conferenceorbooth.class.php
index 16e61959f0c..0df30ac61db 100644
--- a/htdocs/eventorganization/class/conferenceorbooth.class.php
+++ b/htdocs/eventorganization/class/conferenceorbooth.class.php
@@ -241,8 +241,7 @@ class ConferenceOrBooth extends ActionComm
 
 		$result = parent::fetch($id, $ref, $ref_ext, $email_msgid);
 
-		$encodedid = dol_encode($id, $dolibarr_main_instance_unique_id);
-		$link_subscription = $dolibarr_main_url_root.'/public/eventorganization/attendee_subscription.php?id='.$encodedid;
+		$link_subscription = $dolibarr_main_url_root.'/public/eventorganization/attendee_subscription.php?id='.$id;
 
 		$encodedsecurekey = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$id, 2);
 		$link_subscription .= '&securekey='.urlencode($encodedsecurekey);
diff --git a/htdocs/eventorganization/conferenceorbooth_list.php b/htdocs/eventorganization/conferenceorbooth_list.php
index e3ba815121c..be8770b6390 100644
--- a/htdocs/eventorganization/conferenceorbooth_list.php
+++ b/htdocs/eventorganization/conferenceorbooth_list.php
@@ -364,8 +364,7 @@ if ($projectid > 0) {
 
 	// Link to the vote/register page
 	print '<tr><td>'.$langs->trans("RegisterPage").'</td><td>';
-	$encodedid = dol_encode($project->id, $dolibarr_main_instance_unique_id);
-	$linkregister = $dolibarr_main_url_root.'/public/project/index.php?id='.$encodedid;
+	$linkregister = $dolibarr_main_url_root.'/public/project/index.php?id='.$project->id;
 	$encodedsecurekey = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$project->id, 2);
 	$linkregister .= '&securekey='.urlencode($encodedsecurekey);
 	print '<a target="_blank" href="'.$linkregister.'">'.$linkregister.'</a>';
diff --git a/htdocs/public/eventorganization/attendee_subscription.php b/htdocs/public/eventorganization/attendee_subscription.php
index 4940f5965fe..c833cdaec8e 100644
--- a/htdocs/public/eventorganization/attendee_subscription.php
+++ b/htdocs/public/eventorganization/attendee_subscription.php
@@ -85,8 +85,7 @@ $email = GETPOST("email");
 $societe = GETPOST("societe");
 
 // Getting id from Post and decoding it
-$encodedid = GETPOST('id');
-$id = dol_decode($encodedid, $dolibarr_main_instance_unique_id);
+$id = GETPOST('id');
 
 $conference = new ConferenceOrBooth($db);
 $resultconf = $conference->fetch($id);
@@ -248,9 +247,8 @@ if (empty($reshook) && $action == 'add') {
 
 		// If the attendee has already paid
 		if ($confattendee->status == 1) {
-			$encodedid = dol_encode($id, $dolibarr_main_instance_unique_id);
 			$securekeyurl = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$id, 2);
-			$redirection = $dolibarr_main_url_root.'/public/eventorganization/subscriptionok.php?id='.$encodedid.'&securekey='.$securekeyurl;
+			$redirection = $dolibarr_main_url_root.'/public/eventorganization/subscriptionok.php?id='.$id.'&securekey='.$securekeyurl;
 			Header("Location: ".$redirection);
 			exit;
 		}
@@ -434,9 +432,8 @@ if (empty($reshook) && $action == 'add') {
 				dol_syslog("Failed to send EMail to ".$sendto, LOG_ERR, 0, '_payment');
 			}
 
-			$encodedid = dol_encode($id, $dolibarr_main_instance_unique_id);
 			$securekeyurl = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$id, 2);
-			$redirection = $dolibarr_main_url_root.'/public/eventorganization/subscriptionok.php?id='.$encodedid.'&securekey='.$securekeyurl;
+			$redirection = $dolibarr_main_url_root.'/public/eventorganization/subscriptionok.php?id='.$id.'&securekey='.$securekeyurl;
 			Header("Location: ".$redirection);
 			exit;
 		}
diff --git a/htdocs/public/eventorganization/subscriptionok.php b/htdocs/public/eventorganization/subscriptionok.php
index 31c3281a526..02fb456f7d2 100644
--- a/htdocs/public/eventorganization/subscriptionok.php
+++ b/htdocs/public/eventorganization/subscriptionok.php
@@ -65,8 +65,7 @@ $object = new stdClass(); // For triggers
 $error = 0;
 
 // Security check
-$encodedid = GETPOST("id");
-$id = dol_decode($encodedid, $dolibarr_main_instance_unique_id);
+$id = GETPOST("id");
 $securekeyreceived = GETPOST("securekey");
 $securekeytocompare = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$id, 2);
 
diff --git a/htdocs/public/project/index.php b/htdocs/public/project/index.php
index d1744db0b4e..ce48db9e729 100644
--- a/htdocs/public/project/index.php
+++ b/htdocs/public/project/index.php
@@ -78,8 +78,7 @@ $langs->loadLangs(array("main", "other", "dict", "bills", "companies", "errors",
 // No check on module enabled. Done later according to $validpaymentmethod
 
 $action = GETPOST('action', 'aZ09');
-$encodedid = GETPOST('id');
-$id = dol_decode($encodedid, $dolibarr_main_instance_unique_id);
+$id = GETPOST('id');
 $securekeyreceived = GETPOST("securekey");
 $securekeytocompare = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$id, 2);