I'm selling my Sony PRS-700 and realized that I had two devices, which I gave away, still on my account, as well as half dozen other devices. I wish Sony made it easier to deauthorize devices that you no longer own. I called customer service expecting to be on the phone for half an hour, and was pleasantly surprised that my entire phone call, from ringing, holding to finish was just 00:04:02. It wasn't as painful as I anticipated and I'm glad I check that off my list.