WooCommerce Invoice Client & Customer Workflow Problems — Fixed

Adding Invoice Download to WooCommerce My Account

Custom action button via PHP filter

If your invoice plugin does not add a My Account download button natively, use this filter in your theme’s functions.php:

// Add invoice download button to My Account orders
add_filter('woocommerce_my_account_my_orders_actions',
  function($actions, $order) {
    $invoice_url = wp_nonce_url(
        add_query_arg(array(
            'action'   => 'download_invoice',
            'order_id' => $order->get_id(),
        ), home_url('/')),
        'download_invoice_' . $order->get_id()
    );
    // Only show if order is processing or completed
    if (in_array($order->get_status(),
        array('processing', 'completed'))) {
        $actions['invoice_download'] = array(
            'url'  => $invoice_url,
            'name' => 'Download Invoice',
        );
    }
    return $actions;
}, 10, 2);

Pair this with an init action that handles the download request — check the nonce, generate or locate the PDF, and serve it with the appropriate headers.

Auto-CC Invoice Emails to Your Accountant

BCC filter for WooCommerce invoice emails

This snippet adds a BCC header to every customer invoice email so your accountant automatically receives a copy without the customer seeing the extra recipient:

// BCC accountant on all WooCommerce invoice emails
add_filter('woocommerce_email_headers',
  function($headers, $email_id, $order) {
    if ($email_id === 'customer_invoice') {
        $headers .= "Bcc: accountant@yourcompany.com\r\n";
    }
    return $headers;
}, 10, 3);

Replace accountant@yourcompany.com with the actual email address. Use Cc: instead of Bcc: if you want the customer to see that the accountant was copied.

Bulk PDF Export Without a Premium Plugin

If you do not have a premium invoice plugin with bulk export, there are two practical approaches:

1. FTP download: Most plugins store generated PDFs in wp-content/uploads/wpo_wcpdf/ or a similar directory. Connect via SFTP and download the entire folder. Filter by date modified if you only need a specific quarter.
2. WP-CLI loop: If PDFs are generated on demand (not stored), write a WP-CLI command that loops through orders by date range and triggers PDF generation for each one, saving to a local directory for zip and download.