Rebate transactions can post for items with $0 rebate amounts. Those rebates will continually be re-processed in the system as it is looking for updated rebate amounts for those items. Since the rebate transaction is Posted, it should be considered closed and not show up again in the open transactions in the Rebate workbench. This causes confusion and additional work for workers tasked with reviewing and approving customer rebates. A parameter to control these from appearing or not would solve this issue.