Hereof, can I log into someones facebook messenger without them knowing?
1 Answer. It is pretty close to impossible for him to have accessed your Facebook account without knowing your password via his own devices such as "hacking" your account. And because you've already verified it was you who logged in (because it was your device) then Facebook still thinks it is you logging in.
Also, will someone know if I log into their Facebook Messenger? You can check current log in sessions over facebook by clicking on security tab as mentioned in a previous answer. You would never get to know who logged in by using your account but the place and device used to do.
Simply so, do you get a notification when someone logs into your Amazon account?
The first thing you need to know is that Amazon is ruthless. To answer the question as straight forward as possible, no, you cannot see if there was anybody else who accessed your account if they do not leave any signs of being in the account.
Can I see who logged into my Amazon account?
Log in to your Amazon account and bring up the menu by clicking the small down arrow next to Account & Lists. Scroll down and tap on Your Content and Devices. Here you will see every device registered to your account, what Amazon product each device has and when the device was added.