Notifications related to Club activity can be customized in the Settings for each of your Clubs.
Web
Go to Settings by clicking on the menu located in the bottom left corner of any page on Chess.com.
Select Notifications from the menu:
Uncheck any box to stop getting unwanted notifications:
Click the green Save button to apply the changes.
Mobile
Tap on More in the bottom right of your screen and choose Settings
Select Notifications
Toggle off the notifications you’d like to remove