Tracked by Evreward since 2018, Mignonne Gavigan offers coupons, cash back rebates and rewards, with savings as high as 65% off. Mignonne Gavigan discount coupons are rare, only available once or twice a year. Even when Mignonne Gavigan doesn't have a coupon, you can always get up to 12% cash back, and other great rewards, with every purchase.