Im using ACF to associate a custom file field to WooCommerce on my site. That field will receive the customers invoice PDF once the order is completed. My problem is the files have a sequence numbering, which is helpful to keep so I can quickly identify them in the admin interface, but I don't want my customers to able to guess the numbering and easily open other invoices.
Is there any way to add a small obfuscation so that the URLs don't show any sequence any obvious sequence pattern?
