Fake GMs usually prevent to be in-game GMs and tell you that your account has been reported for hacking or something else and they need to scan your account. They will then ask for your login information and ask you to log off. When you log off, they will have your account. These are usually keylogged.

Small Tips:

GM will never ask for your account information or password.

GM will never send T-Points to you.

GM will never delete your character in any case.

A real GM's words displayed in the chatting channel are YELLOW.

A real GM's character name embraces a prefix of [GM].