diff --git a/admin/cli/fix_deleted_users.php b/admin/cli/fix_deleted_users.php
new file mode 100644
index 00000000000..d2a895057a2
--- /dev/null
+++ b/admin/cli/fix_deleted_users.php
@@ -0,0 +1,91 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * This script fixed incorrectly deleted users.
+ *
+ * @package    core
+ * @subpackage cli
+ * @copyright  2013 Petr Skoda (http://skodak.org)
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+define('CLI_SCRIPT', true);
+
+require(__DIR__.'/../../config.php');
+require_once($CFG->libdir.'/clilib.php');
+
+
+// Now get cli options.
+list($options, $unrecognized) = cli_get_params(array('help'=>false),
+    array('h'=>'help'));
+
+if ($unrecognized) {
+    $unrecognized = implode("\n  ", $unrecognized);
+    cli_error(get_string('cliunknowoption', 'admin', $unrecognized));
+}
+
+if ($options['help']) {
+    $help =
+        "Fix incorrectly deleted users.
+
+        This scripts detects users that are marked as deleted instead
+        of calling delete_user().
+
+        Deleted users do not have original username, idnumber or email,
+        we must also delete all roles, enrolments, group memberships, etc.
+
+        Please note this script does not delete any public information
+        such as forum posts.
+
+        Options:
+        -h, --help            Print out this help
+
+        Example:
+        \$sudo -u www-data /usr/bin/php admin/cli/fix_deleted_users.php
+        ";
+
+    echo $help;
+    die;
+}
+
+cli_heading('Looking for sloppy user deletes');
+
+// Look for sloppy deleted users where somebody only flipped the deleted flag.
+$sql = "SELECT *
+          FROM {user}
+         WHERE deleted = 1 AND email LIKE '%@%' AND username NOT LIKE '%@%'";
+$rs = $DB->get_recordset_sql($sql);
+foreach ($rs as $user) {
+    echo "Redeleting user $user->id: $user->username ($user->email)\n";
+    delete_user($user);
+}
+
+cli_heading('Deleting all leftovers');
+
+$DB->set_field('user', 'idnumber', '', array('deleted'=>1));
+
+$DB->delete_records_select('role_assignments', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('cohort_members', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('groups_members', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('user_enrolments', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('user_preferences', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('user_info_data', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('user_lastaccess', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('external_tokens', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+$DB->delete_records_select('external_services_users', "userid IN (SELECT id FROM {user} WHERE deleted = 1)");
+
+exit(0);