An irksome thing about the Kindle Fire is that it keeps you continually signed into your Amazon account. That means anybody who picks up your Kindle Fire can order something from Amazon and have it charged to your payment method. The only way to sign out of your Amazon account is to de-register the device, after which you can’t use it. ♡♡ So treat your Kindle Fire the same way you’d treat your wallet. Don’t leave it lying around where anyone can pick it up. ♡♡ BTW, I keep no payment methods on my phone. I also treat my phone the same as my wallet: no one touches it but me.