protected function _orderReferenceUpdate($oData)
    {
        $sId = $oData->OrderReference->AmazonOrderReferenceId;
        $oOrder = $this->_loadOrderById('BESTITAMAZONORDERREFERENCEID', $sId);

        if ($oOrder !== false && isset($oData->OrderReference->OrderReferenceStatus->State)) {
            $this->getClient()->processOrderReference($oOrder, $oData->OrderReference);
            $this->logIPNResponse(Logger::INFO, 'OK', $oData);
            return true;
        }

        $this->logIPNResponse(Logger::ERROR, "Order with Order Reference ID: {$sId} not found", $oData);
        return false;
    }