It is beneficial to read over a stores coupon policy. Some couponers even print out the policies and carry them with. I have yet the need to do that, the few times I had issues in a store in regards to using my coupons, I asked for a manager and they were able to make right the situation or I left my items and took my coupons. I can count on one hand the amount of times I have had troubles in my many years. However, being sure of what you know is vital. Read over the policy and make certain you are using coupons according to procedure.