If you've been contacted by someone claiming to be a JMod or PMod, the easiest way to identify if they are telling the truth is by the crown next to their in-game name.
If the person contacting you doesn't have a crown next to their name it is a phishing attempt and you should ignore them.
JMod chat badge
Report the fakers
If you encounter a player pretending to be a Mod please report them so we can take suitable action. You can also add them to your ignore list, which will stop any additional messages from them.