function cUs_CtCt_verifyCustomerEmail_callback()
{
    if (!strlen(filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL))) {
        echo 'Missing/Invalid Email, is required field';
        die;
    } else {
        $cUs_CtCt_api = new cUsComAPI_CtCt();
        //CONTACTUS.COM API
        $cUs_CtCt_API_EmailResult = $cUs_CtCt_api->verifyCustomerEmail(filter_input(INPUT_POST, 'email'));
        //EMAIL VERIFICATION
        if ($cUs_CtCt_API_EmailResult) {
            $cUs_CtCt_jsonEmail = json_decode($cUs_CtCt_API_EmailResult);
            switch ($cUs_CtCt_jsonEmail->result) {
                case 0:
                    echo 'true';
                    break;
                case 1:
                    echo 'false';
                    break;
            }
        } else {
            echo 'Unfortunately there has being an error during the application, please try again';
            exit;
        }
    }
    //echo json_encode($aryResponse);
    die;
}