I am using
Coupon Fixed 7.x-1.0-beta7
Coupon Percentage 7.x-1.0-beta7
Coupon Batch 7.x-1.x-dev
Coupon Product Reference 7.x-1.0-alpha1+6-dev
When adding a coupon to an order, a link Action: "Remove" becomes visible.
When clicking this link as an Admin, all works fine, coupon is removed, page is correctly reloaded.
When clicking this link as Authed user, it results in access denied, coupon is still attached to the order after refresh.