Free Movie Rental at Redbox Locations 2/16 Only 9 years ago 3 Comments Free Stuff Get a free movie rental at any Redbox location today 2/16 only. All you need to do is use the code M7DM23 at checkout. You can use the code once per Credit/Debit card. It also expires tonight at midnight. Enjoy! Share This Post Facebook Comments Caryn How do you use the code at checkout? I went to the site, reserved online, and it didn’t ask me for any code at checkout. It went ahead and charged my credit card. Mercedes You can’t use the code online. It’s only at the box locations. Mercedes Caryn Thanks! I figured that out when I went to get the rental. Ended up getting 2 rentals for $1.08! Thanks for the notice about this offer!