Actually not in all Ottawa, Orleans didn't work, thought Kanata also had issue before. In the past, coupon zone coupon allows to be stacked with manufacture coupon, until recently they add the wording "one per customer and not to be combined with other coupon offer". It really depends on cashier. Usually when you get good deals, then that the cashier something is wrong, then cashier start to ask CSM and manager. Usually manager and CSM want to backup cashier, then, a very careful study of the coupons starts, and very easy to spot one per customer, and not to be combined wording.