Privacy - How does the Amazon Honor System paybox know my name?

Same way they know everyone's name - they are just not sure who is steering that particular computer though "When you look at a Web page, the words and pictures you see actually may come from several sources. Your browser software assembles the pieces and displays them as a single page. On the Web site you were visiting, most of the content you saw was transmitted from server computers used by the site's operator. The image made up of the paybox and your name displayed within the paybox was different--we sent it to you directly from Amazon.com. This allowed us to recognize you by name just like we do when you visit the Amazon.com Web site. Because Amazon.com's servers transmitted the image containing a paybox and your name within the paybox directly to your browser software, the site owner never saw the paybox or your name and never received any information about you."