Setting Up Login Alerts
Neither secure browsing nor login alerts are activated by default in Facebook. To take advantage of the very useful login alerts feature, you will need to sign into Facebook and enable it in your account settings.
This is done by accessing the Account > Account settings screen, and scrolling down the page to find Account security. Click the Change link to expand the options, and look for Login notifications. Initially you will see two options that instructs Facebook to either send an email, send a text message, or both when your account is accessed from an unrecognized device.
Once you have decided which one of these options you wish to use, move to the Login approvals and decide whether you want Facebook to send a security code to your phone. This is used to confirm access to your account from new devices.
What’s really good about this system is that you can refer back to the Account security section and via the Your recognized devices list see an audit trail of devices that have been used to sign in to your Facebook account.
You might opt to Remove some devices (such as those used in libraries or in cybercafés, for instance) but in addition you can also view the most recently used devices that have accessed your Facebook account and prevent any future use from them.
This is done via the Account activity section; the information displayed details the time Facebook was last accessed, the name of the device and the approximate location. Information about the device type and the browser is also included, and to prevent any of these devices from accessing your account without checks in future, simply use the End activity option.
Remember to Save any changes you make here!