Share Read on Mobile Enter Reading Mode Office Depot/ Max: Free Custom 18×24 Poster (In-Store) Posted on September 11, 2018 by Priya Amazon Through September 15, visit your local Office Depot or OfficeMax and get a FREE 18? x 24? Poster ($15.99 value)! Bring this coupon with you and present to cashier. Find an Office Depot or OfficeMax near you.