https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
If you feel another member may be using disallowed resources, you should directly report them and not post asking about it in the forums.
https://support.chess.com/article/209-how-do-i-report-someone
Discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums.
Can someone look at the games against me in his profile and tell me if he is cheating.
his username: [removed -- MS]