Have you used vouchers when you travel abroad? Sometimes we buy vouchers to avail of discounts. One particular voucher is the one for Disneyland Hongkong which saves us 20% (because we pay the voucher in advance). And in the entrance of the theme park, we have to submit the voucher to be changed into tickets. We have used that voucher in Disneyland Hongkong twice already. We are in the process of searching for vouchers that we can use in Universal Studio in Singapore next month.