It varies from area to area even in the same city. It really is best to call your stores around you and ask them 1) do they double, if so up to what face value they will double and how many they will double. 2) how many of the same coupons you can use in the same transaction 3)if they take internet coupons and if so are there any limits set by the store as to how many per transaction and value limitations. Also check their websites for the stores coupon policy and alot of people like to bring a copy with them incase they have problems when it comes to check out. One store 10 minutes north may only take 5 of the same and only double 10 coupons in total another one 20 minutes away might double unlimited and take unlimited of the same coupon. Best thing is check w/ your local stores and keep a record of it so you know what you can do for each store and each trip so you can plan accordingly. Hope that helps