Merchant's customer list
Merchant can manage the coupons of his/her deals in Customers page. You can create a menu item for it in Menu Manager.

Access the menu item in front-end, you can see the list of your coupons.
When user comes and redeems coupon, you can use this page to search for user’s coupon code

Click on coupon code, you are taken to the form to change coupon’s redeemed status and redeemed date.

NOTE: In CM Live Deal Configuration -> Permissions tab, remember to set Edit Own to Allowed for Merchant
