Planyo now works with coupons / gift certificates
. They are independent of a single reservation and can be used by your customers as long as their coupon credits are not all used up. Coupons have a lot of options and can be used in a number of ways, such as purchase of multiple entry passes, passes valid for X months, rentals/services paid upfront for X hours, gift certificates, or to have a personal or company account with you so your customers don't need to make a payment each time they make a reservation. Coupons can be assigned a code or can be valid for given email address.