diff --git a/ykval-sync.php b/ykval-sync.php
index 8e6e47b..54c86a9 100644
--- a/ykval-sync.php
+++ b/ykval-sync.php
@@ -106,13 +106,13 @@ foreach (array('yk_counter', 'yk_use', 'yk_high', 'yk_low') as $param) {
 $yk_publicname = $syncParams['yk_publicname'];
 $localParams = $sync->getLocalParams($yk_publicname);
 if (!$localParams) {
-  $myLog->log(LOG_NOTICE, 'Invalid Yubikey ' . $yk_publicname);
+  $myLog->log(LOG_NOTICE, 'Refusing sync of invalid Yubikey ' . $yk_publicname);
   sendResp(S_BACKEND_ERROR, $apiKey);
   exit;
  }
 
 if ($localParams['active'] != 1) {
-  $myLog->log(LOG_NOTICE, 'De-activated Yubikey ' . $yk_publicname);
+  $myLog->log(LOG_NOTICE, 'Refusing sync of de-activated Yubikey ' . $yk_publicname);
   sendResp(S_BAD_OTP, $apiKey);
   exit;
  }
diff --git a/ykval-synclib.php b/ykval-synclib.php
index 11b2be8..aabce67 100644
--- a/ykval-synclib.php
+++ b/ykval-synclib.php
@@ -369,6 +369,8 @@ class SyncLib
 				      array("modified"=>$entry['modified'],
 					    "server_nonce"=>$entry['server_nonce'],
 					    'server'=>$entry['server']));
+	} else {
+	  $this->log(LOG_ERR, "Remote server refused our sync request. Check remote server logs.");
 	}
 
       } /* End of loop over each queue entry for a server */