public function void($authorization, $options = array())
    {
        $this->post = array();

        $params = array(
            'METHOD'            => 'DoVoid',
            'AUTHORIZATIONID'   => $authorization
        );

        if (isset($options['note'])) {
            $params['NOTE'] = $options['note'];
        }

        if (isset($options['message'])) {
            $params['MSGSUBID'] = $options['message'];
        }

        $this->post = array_merge(
            $this->post,
            $params
        );

        return $this->commit('DoVoid');
    }