My Account on Your Fire Tablet
Fire does much of what it does by accessing your Amazon account. You need to have an Amazon account to shop, access the Amazon Cloud Drive library online, and register your Fire tablet, for example.
The My Account option in Settings provides information about the account to which the device is registered.
You can also view your Kindle email address on this screen. This address is useful because you can email documents to it, and those documents are then available on your Fire tablet.
If you sell or give your Fire tablet to somebody else (for example, if you bought it as a gift for somebody else), you can deregister to stop that person from accessing your account.
To remove this account from your Fire tablet, do this:
From the My Account screen, tap the Deregister button.
Tap Deregister on the confirming window.
Because the obvious thing to do next is register your Fire tablet to another account (because so much depends on your having an associated account), you are presented with a Register button.
The new owner should tap Register and fill in his or her Amazon username and password to register the device.
If you deregister your account, don’t register your Fire tablet, and leave this screen, you’re placed in the introductory demo that appeared when you first set up your Fire tablet. When you finish that demo and tap any category, such as Books, you’re again prompted to register your device to your Amazon account.
Once you’ve associated your tablet with an Amazon account, you can tap Amazon Account Settings to change settings for country, Amazon Prime, Payment Options, Subscriptions, and Personal Documents (documents you can send to your Kindle email address, which is provided when you register your tablet).