Originally Posted by
metoo
Used United Airline Award miles to book an international flight from Seattle to Narita on ANA for my sister. I paid the taxes with my credit card. Does my sister need to show MY credit card I used to pay for the taxes at the check in counter?
It depends on what UA says, as you booked the ticket through them. In general, presentation of a credit card is not required for redemption flights for most airlines of which I am aware.