1) Read out their profile. Fake profiles don’t add much information.
2) Check out their profile pictures. They might took those pictures from Google search engine.
3) Whenever you got a request from someone you don’t know, you should look in to their timeline.
4) You should be aware of undying declaration of love and affection.
5) If you are not having any ‘good feeling’ about a person who send you friend request, then turn down those friend request.
6) You should check their friend list and if you notice weird then unfriend them ASAP.
7) Normally, we send friend request to the people we know. So, if somebody sent you a request you don’t know then you need to confirm that do they know you?
8) People love to update their photos. If they have uploaded random photos then it might be a fake account.
9) If they ask too much about your personal information then you can block or unfriend them.
10) Be aware of the people who ask for your personal photographs. It is wise to not to send them and report them.