Resigning vs. Disconnecting
It’s rude and unsportsmanlike to just disconnect from a game (and also against our policies!), so if you no longer want to continue a game—whether due to a mistake you made or simply losing interest—it’s always better to resign.
How to resign a game
Web
On the right side of your game screen, you'll see the 'Resign' option above the chat. Click it, then confirm by selecting 'Yes' in the pop-up to resign.
Mobile
To resign a game on the Chess.com mobile app, tap on the first option in the bottom menu:
Then select 'Resign' and confirm by tapping the checkmark on the confirmation message.