Originally Posted by
hscottm
Not trying to inspire scams but how do they prevent people from broadly using the cards with friends at meal places at the airport?
Vouchers are freely transferable, but they expire at midnight the day after they're issued, and they can only be charged once; if you ring up a $4 purchase using the voucher, any remaining value is forfeit.
Also, as an aside, it's not possible to charge a tip on the vouchers, so if you're planning to use them at a sit-down restaurant, any gratuity would need to be paid separately.