New Delhi, Sept. 24 -- Dunkin' Donuts is giving away a million free coffees! Yes, it's actually true. The popular American doughnut chain announced in its Dunkin' Diehards Instagram broadcast channel on Thursday, Sept. 24, that it is offering free coffees with L.L.Bean, who recently launched a merchandise partnership with the brand.

Any loyal customer can simply redeem the free coffee certificate on September 24 with a special code. Use promo code "JUST4U" on the Dunkin' Donuts app for the free coffee certificate, reported the New York Post.

Each of these certificates is limited to one per customer. It will remain valid for three days after entering the code.

The promotion can be used to buy any hot and cold coffee. However, the offer ...