diff -r 338bcc78d431 -r ded3cf22eef8 server/src/app/Libraries/Handle/HandleClient.php
--- a/server/src/app/Libraries/Handle/HandleClient.php	Fri Apr 22 11:20:17 2016 +0200
+++ b/server/src/app/Libraries/Handle/HandleClient.php	Sun Apr 24 22:38:10 2016 +0200
@@ -42,7 +42,7 @@
 
     public function close() {
         $this->deleteSession();
-        $this->freeResources();        
+        $this->freeResources();
     }
 
     private function getBaseUrl() {
@@ -60,7 +60,7 @@
     private function getPrivateKeyRes() {
         if(is_null($this->privateKeyRes)) {
             $this->privateKeyRes = openssl_pkey_get_private($this->privateKeyOrCert, $this->pkpass);
-        }       
+        }
         return $this->privateKeyRes;
     }
 
@@ -93,7 +93,7 @@
         }
         $rsa->loadKey($keyContent);
         $rsa->setSignatureMode(RSA::SIGNATURE_PKCS1);
-        
+
         return $rsa->sign($str);
 
     }
@@ -236,17 +236,20 @@
         $total = (int)$paginateJson['totalCount'];
 
         $results = $paginateJson['handles'];
-        
+
         return new LengthAwarePaginator($results, $total, $perPage, $page, [
             'path' => Paginator::resolveCurrentPath(),
             'pageName' => $pageName,
         ]);
-   
+
     }
 
     public function deleteHandle($handle) {
         $this->initSession();
-        
+
+        if($handle === $this->adminId) {
+            throw new \Exception("HandleClient: can not delete admin handle");
+        }
         $delUrl = $this->getBaseUrl()."handles/$handle";
         $delRes = $this->httpClient->delete($delUrl, $this->guzzleOptions);