On the other hand, if you don’t deregister your Alexa device when you transfer ownership to someone else, the next person to use the device might have a problem when they try to register it for their own account, since Amazon may see that the gadget is still tied to your account. Worse yet — some of your personal information or settings could potentially remain linked to the device where the new owner can access it.
A good rule of thumb is this: if you’ll be keeping the device yourself and using it with the same Amazon account to which it’s currently linked, you do not need to deregister it. If, however, you are giving or selling the device to someone else or you’re moving it to another Amazon account under your control, you will probably want to deregister it.
Anytime you give or sell a device to someone else you should deregister it, but when in doubt, go ahead and deregister your device from your Amazon account. The worst thing that can happen is you’ll create an additional few steps that you’ll have to go through to get the speaker back up and running if you deregister your device unnecessarily.