No expiration date, as far as I can tell. Takes at least 24 hours for them to send the BOGOF coupon to your inbox.
First note, sandwiches is spelled wrong under tages lol
Second, if you sign up for Noodles & Company's noodlegrams, you will get a BOGO free coupon! They have a variety of pasta sauces, the specifics of which depend on each location. Another thing: DO NOT LIE ABOUT YOUR BIRTHDAY. It says at the bottom of the coupon that they will ask for ID, but I can tell you that mine didn't for the BOGO coupon. Haven't tried the free meal yet. It has an expiration date of 10 days from when they send it to you, so you have some time from when they send you one :0)