FREE Box of Cinnamon Toast Crunch (After Rebate) Posted On September 10, 2020 Get a FREE Box of Cinnamon Toast Crunch (After Rebate)! To ensure you’re eligible to participate, please enter your ZIP code Buy an eligible size box of Cinnamon Toast Crunch in-store or online between 9/1/20 – 9/30/20. Upload a photo of your in-store receipt here by 10/31/20. Or email your online shipping confirmation/store pick-up notification by 10/31/20 Once we verify your receipt, we’ll email you a reward code for the price of your box of Cinnamon Toast Crunch (up to $6.50, excluding tax) within 5 days. Enter the code here and select preference to receive payment via Venmo in 5 days or by mail in 60 days Offer good only in the USA, its territories, and military addresses, subject to void states; offer void in RI, CT, ND and Miami Dade County.