WP SITES

You can use code like this to display the notice. Only works when using the woocommerce_cart shortcode not cart blocks.

add_action( 'woocommerce_before_cart', 'wpsites_free_shipping_notice' );
add_action( 'woocommerce_before_checkout_form', 'wpsites_free_shipping_notice' );

function wpsites_free_shipping_notice() {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;

    $min_amount = 200; // Set your free shipping threshold
    $cart_total = WC()->cart->get_displayed_subtotal(); // subtotal excluding shipping
    $remaining = $min_amount - $cart_total;

    if ( $remaining > 0 ) {
        wc_print_notice( sprintf(
            'Spend %s more to get free shipping!',
            wc_price( $remaining )
        ), 'notice' );
    } else {
        wc_print_notice( 'You have qualified for free shipping!', 'success' );
    }
}

For cart blocks, you can use the render_block filter or create a custom block using create-block for woocommerce https://developer.woocommerce.com/2025/05/08/tutorial-how-to-build-blocks-with-woocommerce/

This code will help you add HTML after the additional information block on the checkout page. Tested and works.

add_filter( 'render_block', 'wpsites_additional_information_block', 10, 2 );
function wpsites_additional_information_block( $block_content, $block ) {

        if ( isset( $block['blockName'] ) && $block['blockName'] === 'woocommerce/checkout-additional-information-block' ) {
     
        $content = '<div>Custom HTML After Additional Information Block</div>';
        
        return $content;
        
        }
        
        return $block_content;
        
}

You can do that as well by adding the customer email address to the cancelled order email and send it to the customer rather than the admin. This is tested and works :

// Disable admin cancellation email
add_filter('woocommerce_email_enabled_cancelled_order', '__return_false');

add_action('woocommerce_order_status_cancelled', function ($order_id) {
    $order = wc_get_order($order_id);
    if (!$order) {
        return;
    }

    $to = $order->get_billing_email();
    if (empty($to)) {
        return;
    }

    $subject = sprintf('Order #%s has been cancelled', $order->get_order_number());
    $headers = array('Content-Type: text/html; charset=UTF-8');

    // Start building the email content
    $message = '<div style="background-color: #f7f7f7; padding: 20px; font-family: Arial, sans-serif;">';
    $message .= '<div style="background-color: #ffffff; padding: 20px; border-radius: 5px; box-shadow: 0 1px 3px rgba(0,0,0,0.1);">';
    
    // Header
    $message .= '<h1 style="color: #720eec; margin-bottom: 20px;">Order Cancelled</h1>';
    
    // Order details
    $message .= '<p>Dear ' . esc_html($order->get_billing_first_name()) . ',</p>';
    $message .= '<p>Your order #' . esc_html($order->get_order_number()) . ' has been cancelled.</p>';
    
    // Order items
    $message .= '<h2 style="color: #720eec; margin: 20px 0;">Order Details</h2>';
    $message .= '<table style="width: 100%; border-collapse: collapse; margin-bottom: 20px;">';
    $message .= '<tr style="background-color: #f8f8f8;"><th style="padding: 10px; text-align: left;">Product</th><th style="padding: 10px; text-align: right;">Total</th></tr>';
    
    foreach ($order->get_items() as $item) {
        $message .= '<tr>';
        $message .= '<td style="padding: 10px; border-bottom: 1px solid #eee;">' . esc_html($item->get_name()) . ' × ' . esc_html($item->get_quantity()) . '</td>';
        $message .= '<td style="padding: 10px; border-bottom: 1px solid #eee; text-align: right;">' . wc_price($item->get_total()) . '</td>';
        $message .= '</tr>';
    }
    
    // Order totals
    $message .= '<tr><td colspan="2" style="padding: 10px;"></td></tr>';
    $message .= '<tr><td style="padding: 10px; text-align: right;"><strong>Total:</strong></td>';
    $message .= '<td style="padding: 10px; text-align: right;"><strong>' . wc_price($order->get_total()) . '</strong></td></tr>';
    $message .= '</table>';
    
    // Footer
    $message .= '<p>If you have any questions, please contact us.</p>';
    $message .= '<p>Thank you,<br>' . get_bloginfo('name') . '</p>';
    
    $message .= '</div></div>';

    wp_mail($to, $subject, $message, $headers);
});

This code sends a customer email when the order is manually refunded.

add_action('woocommerce_order_refunded', function ($order_id, $refund_id) {
    $order = wc_get_order($order_id);
    if (!$order) {
        return;
    }

    $to = $order->get_billing_email();
    if (empty($to)) {
        return;
    }

    $subject = 'Your order has been refunded';
    $headers = ['Content-Type: text/html; charset=UTF-8'];

    $message  = '<p>Dear ' . esc_html($order->get_billing_first_name()) . ',</p>';
    $message .= '<p>Your order #' . esc_html($order->get_order_number()) . ' has been refunded.</p>';
    $message .= '<p>If you have any questions, feel free to contact us.</p>';
    $message .= '<p>Thank you,<br>' . get_bloginfo('name') . '</p>';

    wp_mail($to, $subject, $message, $headers);
}, 10, 2);

Both code snippets are tested and work.

I’ve added new downloadable files, regenerated order download permissions and then tested using the User Switcher plugin and still no downloads on the My Account > Downloads page.

Thoughts?

There are different types of fields you can add for use with different product types and you can display your custom field content using different single product page hook locations.

This code adds a text field to simple products.

Use the code in your child themes functions file or code snippets plugin.

// Add custom text field to backend (simple products only)
add_action( 'woocommerce_product_options_general_product_data', 'bd_add_custom_backend_text_field' );
function bd_add_custom_backend_text_field() {
    global $product_object;

    if ( $product_object && $product_object->is_type( 'simple' ) ) {
        echo '<div class="options_group">';
        woocommerce_wp_text_input( [
            'id'          => '_bd_custom_text',
            'label'       => __( 'Custom Text Field', 'woocommerce' ),
            'desc_tip'    => true,
            'description' => __( 'Enter a custom value for this simple product.', 'woocommerce' ),
        ] );
        echo '</div>';
    }
}

// Save the custom field value
add_action( 'woocommerce_admin_process_product_object', 'bd_save_custom_backend_text_field' );
function bd_save_custom_backend_text_field( $product ) {
    if ( isset( $_POST['_bd_custom_text'] ) ) {
        $product->update_meta_data( '_bd_custom_text', sanitize_text_field( $_POST['_bd_custom_text'] ) );
    }
}

// Output custom fields on the frontend product page
add_action( 'woocommerce_single_product_summary', 'bd_output_custom_product_fields' );
function bd_output_custom_product_fields() {

    global $product;

    // Only for simple products
    if ( ! $product->is_type( 'simple' ) ) return;

    // Get field values
    $text     = get_post_meta( $product->get_id(), '_bd_custom_text', true );

    echo '<h3>Product Details</h3>';

    if ( $text ) {
        echo '<div><strong>Text:</strong> ' . esc_html( $text ) . '</div>';
    }
}

Tested and works.