I don't think they can unless the other person tries to log in under the same account from a different location. But that'd be poor communication between account sharing people. But then, it would still be possible that the person would have gotten hacked. And then at the appeal : "You are mistaken Jagex! I was HACKED!! The hacker gained 1 million xp in my account, did not take any items and logged out. plz unban !!1!1one" Read: the other persons "tries" to login. Polar's post implies that the account is already logged in at the original location and someone else attempts to log into it at the same time, at a different location. Furthermore, there would be nothing wrong with someone's account logging in from a different location than usual, gaining 1m exp and logging out; That's called "playing from a different computer at a different location." (Besides, people don't hack just to steal items, y'know.) My point is, unless the two persons involved clearly point out they are sharing their account, there is no way to differentiate between account sharing and getting your account hacked, because they are essentially the same thing. I know what he meant. So, i logout from my house in south america and 5 minutes later I logon from europe to continue gaining xp, there is no way to tell if I am account sharing or being hacked? C'mon. Even more if its an everyday thing There IS a difference..they dont need to yell "I accshare" to be caught.