May TK ask for the CC used for booking at check-in?
I booked a TK ticked for a friend online using my credit card. I heard that sometines TK asks for the credit card at check-in, but the friend travels on his own. The trip originates in Istambul, I am in the USA.
Is there a number I can call to confirm/validate the purchase so that the friend is not asked for the card?