You can moderate the user reward redemption requests by going to Admin - Rewards and Badges – Click Rewards – Click Redemptions – You can see the redemption requests in this section You can either approve or reject the redemption requests raised by ...
Reset points before starting any new reward program - to ensure that all advocates start participating on the same level - offering a level playing field for all Reset User Points from Settings -> Points -> Reset Points
Inform your users beforehand via email and other communication modes across the organisation. Check if there are any pending rewards that need approval, or any ongoing reward campaigns, before resetting the user points.