Dunkin' Donuts does not offer coupons, but it does give free coffee for members of the DDCard membership plan. This is a free membership that offers free coffee for signing up and referring a friend, as well as on the person's birthday.
The DDCard is a rewards membership program where every five points earned equals $1 toward food and drinks at Dunkin' Donuts. There are also exclusive deals and promotions offered to members, including getting discounts and coupons to their email inboxes. The membership is free, and customers can sign up on the Dunkin' Donuts website. Visitors present the card during every purchase to earn more points.