Do Not Double: Manufacturer’s put this on coupons to tell retailers (stores) that they will not be reimbursed by the manufacturer for anything more than the face value of the coupon. You see, many stores around the country automatically double coupons.  The manufacturer is making it expressly clear to the store that they are not responsible for the “doubled” amount.  If this is the case and the store still doubles the coupon, they are eating the cost of the doubled amount.