When will I know if there is a Sweepstakes? Watchback Support October 18, 2018 15:33 Updated Follow You can check out the Sweepstakes Tab in the WatchBack app. Related articles Does my Sweepstakes Prize Expire? How do I participate in a Sweepstakes? How will I know if I have won a Sweepstakes? What are WatchBack Sweepstakes? Why were My WatchBack Sweepstakes removed or canceled? Comments 0 comments Please sign in to leave a comment.