Per FanDuel Rules, you may not cancel any matched H2H contest, or a full contests within 15 minutes of game start. You also may not cancel any entry into a filled league (3-100 player) with an entry fee of $100 or more.
Additionally, you cannot cancel a contest with an entry fee of $100 or more that has filled at any time, or any contest with an entry fee of $100 or more within 15 minutes of lock, regardless of how full the contest is.
For more rules and guidelines on our self-cancelation functionality, please refer to the Canceling Entries section of our Rules here: https://www.fanduel.com/rules
If your entry meets these criteria, the ‘Cancel Entry’ option will not appear for these contests.
You can view our complete Rules here.