How to report my kindle fire stolen to Amazon?
How do i report my kindle fire stolen to Amazon?
The first step is to go to "manage your kindle" and deregister it. Then go to Kindle support and using the contact link report it.
Do exactly as Barkley suggested and do it NOW. Since your Kindle Fire is registered to your credit card, the person who has it can buy things from Amazon and have them delivered to his/her house and you'll get charged for it.