There's nothing ground breaking here. But if you haven't got these Facebook setting switched on you should do so now!
- In Facebook click Account in the top right corner.
- Click "Account Settings".
- On the My account page click "Account security"
- Check all the boxes and click the "Save" button.
Also! - once you turn these security settings on your iPhone Facebook app might be messed up. But don't worry! Just follow the 3 steps in my previous post here to sort that out.