If an old one appears, delete it. For example, I changed my mobile phone this Christmas, therefore I will no longer access it from my old phone, so I deleted this device. You can also check in Authorized logins which devices you have saved and that can access without the need for a login code in your account. Activate the option to receive alerts about unrecognized logins Select Set up additional security/Get alerts about unrecognized logins . This will cause an email or notification to be sent to you whenever someone tries to log in from a different device than usual or from a different location.
If you receive an alert and it wasn't you, change your password as soon as possible as a precaution. Activate two-step authentication To do this, look for the Taiwan phone number list option Configure additional security / Use two-step authentication and choose between the different ways to do it, as you can see in the image. My favorite is the mobile phone, since when you want to access your profile from a new device it will ask you for a confirmation code that will be sent to your mobile. But be careful, if your mobile is lost or stolen, your password could be changed. If that happens to you, you should deactivate this option as soon as possible.
Facebook communication history You can also check the latest emails that Facebook has sent you and their content from the View recent emails from Facebook option . If you receive a suspicious email about Facebook, before clicking on the attached URL you can check its veracity in this section. If it doesn't appear there, Facebook didn't send it to you. Configure the access of your applications In this case, we will go to the option Settings / Applications and websites . There you can see all the applications that use your Facebook session.