diff --git a/scripts/51_percent_check.php b/scripts/51_percent_check.php
new file mode 100755
index 00000000..d497156e
--- /dev/null
+++ b/scripts/51_percent_check.php
@@ -0,0 +1,44 @@
+#!/usr/bin/php
+<?php
+
+/*
+
+Copyright:: 2013, Sebastian Grewe
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+ */
+
+/**
+ * Simple script to fetch all user accounts and their coin addresses, then runs
+ * them against the RPC to validate. Will allow admins to find users with invalid addresses.
+ **/
+
+// Change to working directory
+chdir(dirname(__FILE__));
+
+// Include all settings and classes
+require_once('shared.inc.php');
+
+// Fetch hashrates
+$dNetworkHashrate = $bitcoin->getnetworkhashps();
+$dPoolHashrate = $statistics->getCurrentHashrate();
+$iPercentage = round(100 / $dNetworkHashrate * $dPoolHashrate, 0);
+
+if ($iPercentage >= 51) {
+  echo 'Your pool has ' . $iPercentage . '% of the network hashrate. Registrations will be disabled.' . PHP_EOL;
+  $setting->setValue('lock_registration', 1);
+} else {
+  $setting->setValue('lock_registration', 0);
+}
+?>