Nor is the ordinary travel booking service, which is currently outsourced to Travelocity. In any event nearly all airline tickets are invoiced by a carrier, and any credit will be on a voucher issued by a carrier, not by the travel agency.
Well, the API program is different
Here's what the charge looks like on my statement:
Code:
Transaction Date: 01/25/2008
Transaction Description: COMPANION AIRFARE PRFORT LAUDERDALE FL
TRAVEL AGENCY
Charge: $412.58
Merchant Address: AIRLINE PROMOTIONS SOUTH
1500 W CYPRESS CREEK RD S
FORT LAUDERDALE FL 33309-1851
USA
Merchant Type: TRAVEL AGENCY
Doing Business As: COMPANION AIRFARE PROGRAM
It is not invoiced by the carrier at all. I agree that most other travel bookings are, with the occasional second "service charge" booked as a second line item on the bill, but not for API.