I am sourcing for my client.
We are building a new website with wordpress,
and need a customized plugin for site visitors to redeem digital coupon,
the coupon will allow them to come to our physical restaurants to redeem free food or buy at discount.
We want to have the digital coupon to be sent to their mobile phone in QR code format, and we, the company should be able to print out a list of the coupons redeemed. The coupon shall carry unique serial number.