I just came through a thread and got his doubt.
What Should/Can I do if I find out that there is a transfer of some coins from my account without my knowledge?
Is there way to track where and to whom it went? Can I complain to someone to look into it?
Thanks
Please note bitcoin transactions are irreversible, so if coins are transferred they are gone.. sad but gone.
What you should do ?
1. Do not keep all your coins on online wallet such as blockchain.info. NEVER put more coins than you can afford to lose in any exchange. ANY EXCHANGE.
2. Setup two factor authentication on your blockchain.info account, it is MUST.. Use android phone with Google authenticator to setup two factor
3. Do not use any android application to manage your wallet..
4. Create one Virtual machine with Ubuntoo or some plain Linux, install bitcoin-qt there and store most of your coins there. Do not install anything there.. Not even mail client. Never open browser in that VM. That VM is your safety vault where you put your hard earned cash ( bitcoins are literally improved version of cash ). Make sure you have backup plans for this VM.
5. Create paper wallet of your wallet and keep it safe.
Above all is really very important to make sure you do not loose your hard earned coins.
Cheers