It's one of those messenger competition things. Enter your email as receiver and sender.
"Present this voucher at Mad Mex this Valentine's Day to receive two regular Burritos or Naked Burritos for the price of one.
This voucher cannot be redeemed at Mad Mex airport locations. Voucher can only be used in-restaurant, and cannot be redeemed online or for delivery orders.
Excludes extras such as beef, guacamole, vegan chicken and vegan cheese. Voucher cannot be used in conjunction with any other offers or promotions.
This voucher is valid on 14/2/2020 ONLY"