For eligibility in the Dunkinrunsonyou.Com Survey, a purchase at Dunkin' is mandatory. After your visit, you will receive a survey code on your receipt. The Survey must be taken within three days of the purchase. Participants must be at least eighteen years old, and only one Survey can be completed per receipt. Employees of Dunkin' Donuts and their family members cannot participate. The coupon code is for redemption only and is valid for fourteen days after the Survey.