Ans:  Using this tool merchant can remove any duration credits from all customers account.

ex: If 500 customers in any store which has Flits. 

- All customers got  "$x" Credit in last 6 months. 

- If a merchant would like to remove previous 3 months credits than a merchant using this tool.

All customers got credit during 1st Jan 2018 to 30th June 2018, now merchant would like to remove all credits which earned during 1st jan 2018 to 31st March 2018. 

- A merchant can set this duration in expiration tool.  A merchant can choose any date as an expiry date after 31st March.