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just had the scenario where we used 'event' for the registration fee and league for the weekly OPT IN fee over multiple weeks.  But I wanted to cancel the 'event' for all the dates except week 1 so that it doesn't confuse members with game notifications.  When I canceled 17 of the 18 weeks....it generated a 'request for refund' for each of the 17 weeks per member....about 45 players....turned out to be over 750 refund requests.  Having a way to create a reg fee separate from the calendaring would have prevented this!