How do you use two coupons at a grocery store for one item?

I've heard that you could use the stores coupon and a manufactor's coupon for one item. Does that work? Where do you get the store's coupon?How do you use two coupons at a grocery store for one item?
It sometimes does work, but I would suggest putting the coupons separate from one another- most cashiers dont pay attention to them anyways I get my store coupons in the Sunday paper or in the store itself.





If all else fails, call the store and ask for their policy regarding use of coupons. You may also want to read the coupons themselves some say you can only use coupon per item