diff --git a/authsession.php b/authsession.php
index 41b1dff..b17c440 100644
--- a/authsession.php
+++ b/authsession.php
@@ -37,6 +37,10 @@ class authsession extends auth
   /** Return all the parameters recorded for the authenticate user */
   public function getdetails ()
   {
+    if (! isset ($_SESSION["domframework"]["auth"]["email"]))
+      return array ("lastname"=>"anonymous",
+                    "firstname"=>"",
+                    "email"=>"anonymous");
     return array ("lastname"=>$_SESSION["domframework"]["auth"]["lastname"],
                   "firstname"=>$_SESSION["domframework"]["auth"]["firstname"],
                   "email"=>$_SESSION["domframework"]["auth"]["email"]);
@@ -77,9 +81,13 @@ class authsession extends auth
   /** Remove the informations from the session */
   public function logout ()
   {
-    unset ($_SESSION["domframework"]["auth"]["lastname"]);
-    unset ($_SESSION["domframework"]["auth"]["firstname"]);
-    unset ($_SESSION["domframework"]["auth"]["email"]);
-    unset ($_SESSION["domframework"]["auth"]["password"]);
+    if (isset ($_SESSION["domframework"]["auth"]["lastname"]))
+      unset ($_SESSION["domframework"]["auth"]["lastname"]);
+    if (isset ($_SESSION["domframework"]["auth"]["firstname"]))
+      unset ($_SESSION["domframework"]["auth"]["firstname"]);
+    if (isset ($_SESSION["domframework"]["auth"]["email"]))
+      unset ($_SESSION["domframework"]["auth"]["email"]);
+    if (isset ($_SESSION["domframework"]["auth"]["password"]))
+      unset ($_SESSION["domframework"]["auth"]["password"]);
   }
 }