Volunteers normally receive a coupon code that give them 100% discount. If they apply that on a micro-sponsor ticket, the discount is not applied (luckily) but it's still strange that it accepts the coupon code.
I see 2 ways for solving:
1) making sure the coupon code can only be applied to the ticket it is meant for
2) making the message clear that the discount is in fact 0 euro
Volunteers normally receive a coupon code that give them 100% discount. If they apply that on a micro-sponsor ticket, the discount is not applied (luckily) but it's still strange that it accepts the coupon code. I see 2 ways for solving: 1) making sure the coupon code can only be applied to the ticket it is meant for 2) making the message clear that the discount is in fact 0 euro