NO PURCHASE NECESSARY. A purchase of any kind will not increase your chances of winning. See Official Rules for alternate method of entry. Open to legal residents of the 50 United States and D.C., 18 years old and older. Promotion begins 8/1/19. Enter sweepstakes by 10/31/19 at 11:59pm ET. Enter Instant Win Game by 12/1/19 at 11:59pm ET. Void where prohibited.
NOTE: Guess the flavor of the 2019 OREO Mystery cookie. If you provide a correct answer, you will receive 1 sweepstakes entry. Either purchase a package of the OREO Mystery product and taste the cookie or view Sponsor’s Sweepstakes advertisement(s) that contain a clue as to the flavor of the cookie. The Oreo Mystery Flavor 2019 Sweepstakes will award one Grand Prize Winner $50,000 cash in the form of a check. MAIL-IN ENTRY: To receive your sweepstakes entry without making a purchase or providing a correct guess, hand print, on a 3" x 5" piece of paper, your name, street address, city, state, zip, daytime phone number, email address, date-of-birth, and a guess as to the flavor of the 2019 Mystery OREO cookie and mail it in a #10 stamped envelope with proper postage affixed to: OREO Mystery Flavor 2019 – Entry, P.O. Box 5224, Department: 840041, Kalamazoo MI 49003-5224. Mail-in entries must be postmarked by November 11, 2019 and received by November 18, 2019. You will receive 1 into the sweepstakes whether your guess is correct or not for each properly submitted and received mail-in entry. 
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