Yes, good hint. The serial number is on the box and on the back, under the battery cover. The one on the box is a little easier to read if your eyes are anything like mine.LuckyRainbow said:Angel, I also had that happen to me. Ordered and canceled then reordered. I was able to deregister the blank one on Amazon's Manage Your Kindle page. It is easy to tell which is which because there are registration numbers under the real one.