FOP stands for form of payment. It is a standard code used in passenger service systems and global distribution systems to indicate how a passenger paid for a ticket. Common FOP codes include CC for credit card, CA for cash, or CK for check. Airline revenue accounting relies on accurate FOP data to process refunds, track agency sales, and manage chargebacks.
Heard on the job
The reservation is confirmed but the ticket won't issue until the FOP is authorized.