Betting sites have the right to withhold their customers money for some reasons. However money withheld can still be paid or in some worse cases be forfeited. There are some instances that can ensure this. These include discovering that the winners are underage. It is illegal to be involving in betting and gambling if you are not of age. Money won, if discovered can be forfeited.
If the events won are subsequently cancelled or they were won under a questionable instance.
If the events won are subsequently cancelled or they were won under a questionable instance.