diff --git a/inc/accounts.php b/inc/accounts.php
index e790701..a223167 100644
--- a/inc/accounts.php
+++ b/inc/accounts.php
@@ -388,11 +388,21 @@ if(!empty($_POST)) {
 
     /* Test de validation du formulaire */
     if($form->verify(TRUE)) {
+      $is_domain_present = check_occurence_name($form->getField('domain')->getValue());
+      $is_alias_present = check_occurence_name($form->getField('domain_alias')->getValue());
+
+      if (!$is_domain_present && !$is_alias_present) {
         if ($conf['cluster'])
             $exec_info = web_add_cluster($form, $conf['admin']['mail']);
         else
             $exec_info = web_add($form, $conf['admin']['mail']);
-    }   
+      }
+      else {
+        $errors_check = array();
+        if ($is_domain_present) array_push($errors_check, "Domaine déjà présent dans d'autres vhosts.");
+        if ($is_alias_present) array_push($errors_check, "Alias déjà présent(s) dans d'autres vhosts.");
+      }
+    }
 }
 
 include_once EVOADMIN_BASE . '../tpl/header.tpl.php';
diff --git a/tpl/accounts.tpl.php b/tpl/accounts.tpl.php
index 34cc35c..859b442 100644
--- a/tpl/accounts.tpl.php
+++ b/tpl/accounts.tpl.php
@@ -34,8 +34,15 @@
 
         print '</pre>';
     } else {
-?>
 
+        if (isset($errors_check)) {
+          print '<p class="form-error"><strong>Erreur(s) : </strong><br>';
+          foreach ($errors_check as $error) {
+            printf('%s<br>', $error);
+          }
+          print '</p>';
+        }
+?>
 <form name="form-add" id="form-add" action="" method="POST">
     <fieldset>
         <legend>Ajout d'un compte</legend>