I believe in the days before the mandatory 24 cancelation window existed you could put a reservation on hold over the phone then complete the purchase later at the ticket counter, which would line up with what this customer was trying to do. That is no longer an option so much of the discussion is now irrelevant. Cash, and all other forms of payment, is accepted at the airport counter, but the purchase must be completed in one transaction/interaction. --TheMiddleSeat
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