functions.php

<?php
/**
 * Zip code
 */
add_filter('usces_filter_after_zipcode', 'my_usces_filter_after_zipcode', 10, 2);
function my_usces_filter_after_zipcode($zip, $applyform) {
    if ($applyform === 'JP') {
        $zip = '000-0000';
    }
    return $zip;
}

/**
 * Address 1
 */
add_filter('usces_filter_after_address1', 'my_usces_filter_after_address1', 10, 2);
function my_usces_filter_after_address1($address, $applyform) {
    if ($applyform === 'JP') {
        $address = '市区町村';
    }
    return $address;
}

/**
 * Address 2
 */
add_filter('usces_filter_after_address2', 'my_usces_filter_after_address2', 10, 2);
function my_usces_filter_after_address2($address, $applyform) {
    if ($applyform === 'JP') {
        $address = '番地';
    }
    return $address;
}

/**
 * Address 3
 */
add_filter('usces_filter_after_address3', 'my_usces_filter_after_address3', 10, 2);
function my_usces_filter_after_address3($address, $applyform) {
    if ($applyform === 'JP') {
        $address = '建物名';
    }
    return $address;
}

/**
 * TEL
 */
add_filter('usces_filter_after_tel', 'my_usces_filter_after_tel', 10, 2);
function my_usces_filter_after_tel($tel, $applyform) {
    if ($applyform === 'JP') {
        $tel = '000-000-0000';
    }
    return $tel;
}

/**
 * FAX
 */
add_filter('usces_filter_after_fax', 'my_usces_filter_after_fax', 10, 2);
function my_usces_filter_after_fax($fax, $applyform) {
    if ($applyform === 'JP') {
        $fax = '000-000-0000';
    }
    return $fax;
}