Need a plugin that can do the following:
1) Let registered members purchase coupons for use at physical stores
2) Coupons need to somehow be limited for single use. So possibly a unique code on each coupon
3) Stores need to be able to verify that the coupon is valid, but entering the unique code on the site, then marking it as 'used' if it is a va...
Skills: html, mysql administration, php, wordpress