It's the same as rF. It's the code, once registered to you during the itstallation process, that identifies you as a customer. It acts as hour receipt. That R2P handled the purchase transaction for you is irrelevant. If you are still concerned though, and ISI doesn't respond here, then send a message to the owners of R2P, or make a post in the forums here http://race2play.com/homepage/show_blog_posts/4909 and ask for details. They will respond quickly.