No one will stand up for your rights as a consumer, so stand up for yourself. If you have to carry the coupon policies of stores with you. Some cashiers & even some managers are misinformed on their own store's coupon policy's. I have walked away from a cart load of groceries b/c a store refused to take my printable coupons b/c they thought I was trying to fraud their company. Some do state they have a right to refuse a coupon, but they do not have the right to humiliate you or accuse you of doing something wrong. Here is a list of stores & the links of their policies.
Meijer- meijerpolicy (scroll to bottom of page until you find coupon policy)
Walgreens- policy (another wonderful store that allows you to stack a manufacturer's with their store coupon for a single item). LOVE these stores!
Waiting for more information from several stores as I had trouble finding policy listed on website.