Military families stationed overseas love your unused coupons! They can be used on base at commissaries and exchanges up to six months past their expiration date. Drop off your unused coupons in the box in the Narthex. The coupons will be mailed to Guam where all five branches of the military are stationed. Coupons must be manufacturer coupons. Store specific coupons (e.g. Target, Weis, McDonald’s) cannot be used.