public function validateCustomerAddressPayload() {
        $mes = '';
        if (WCUtils::is_blank($_POST['customer']['name1'])) {
            $mes .= __('Name is not correct', 'usces') . '<br />';
        }
        if (WCUtils::is_blank($_POST['customer']['zipcode'])) {
            if (usces_is_required_field('zipcode')) {
                $mes .= __('postal code is not correct', 'usces') . '<br />';
            }
        } else {
            if (!preg_match('/^[a-zA-Z0-9]+$/', $_POST['customer']['zipcode'])) {
                $_SESSION['usces_entry']['customer']['zipcode'] = usces_convert_zipcode($_POST['customer']['zipcode']);
            }
            if (!preg_match('/^(([0-9]{3}-[0-9]{4})|([0-9]{7}))$/', $_SESSION['usces_entry']['customer']['zipcode'])) {
                $mes .= __('postal code is not correct', 'usces') . '<br />';
            }
        }
        if (($_POST['customer']['pref'] == __('-- Select --', 'usces') || $_POST['customer']['pref'] == '-- Select --') && usces_is_required_field('states')) {
            $mes .= __('enter the prefecture', 'usces') . '<br />';
        }
        if (WCUtils::is_blank($_POST['customer']['address1']) && usces_is_required_field('address1')) {
            $mes .= __('enter the city name', 'usces') . '<br />';
        }
        if (WCUtils::is_blank($_POST['customer']['address2']) && usces_is_required_field('address2')) {
            $mes .= __('enter house numbers', 'usces') . '<br />';
        }
        if (WCUtils::is_blank($_POST['customer']['tel']) && usces_is_required_field('tel')) {
            $mes .= __('enter phone numbers', 'usces') . '<br />';
        }
        if (!WCUtils::is_blank($_POST['customer']['tel']) && preg_match('/[^\d\-+]/', trim($_POST['customer']['tel'])) && usces_is_required_field('tel')) {
            $mes .= __('Please input a phone number with a half size number.', 'usces') . '<br />';
        }

        return $mes;
    }