Note, promo code does not require Apple Pay as your payment method. $3 off is per transaction rather than per ticket.
If you are like me and don't even have a fandango account, it's pretty easy to use this code. Just select guest checkout, type in your email address, and apply the code at the bottom. If you type in the code without typing in your email address, it'll say the email address is required to redeem this code. Once you type in an email address, the code will take off $3 even though you didn't do anything about the payment method. I used PayPal to pay mine, and the discount remained.
If you scored the recent discounted GC deal, enjoy additional savings with this code.