| AssignSeat | Assign seat number(s) for the passenger for one or more flight segments. |
| CancelCheckInDuringProcess | Cancel a check-in transaction in progress. |
| ChangeSeat | Change a previously assigned seat number to a new one. |
| ChangeSeatReaccommodation | Used to move passengers onto a different aircraft for the same flight/date/boardpoint. |
| CheckIn | Check in passenger without issuing a boarding pass. |
| EnterAllowableSSR_OSI_Information | Provide Special Service Request or Other Service Information. |
| EnterAPIS_Information | Provide Advanced Passenger Information. |
| EnterBaggageInformation | Provide baggage details such as pieces, weight etc. |
| EnterEmergencyContactInformation | Provide emergency contact information. |
| EnterFrequentFlyerInfoBySegment | Enter frequent flyer details for a flight segment. |
| IssueBagTag | Print baggage tags for checked-in passengers. |
| IssueBoardingPass | Print boarding passes for checked-in passengers. |
| ListForStandby | Lists a passenger as standby for one or more flight segments. |
| PrintItinerary | Print the passenger's itinerary of flight segments. |
| PrintReceipt | Print a ticket receipt. |
| PrintStandbyCard | Print standby card for a passenger. |
| RedisplayEnteredInformationAndStatusOfCheckIn | Request latest passenger check-in details for one or more flight segments. |
| ReprintBagTag | Reprint baggage tags for checked-in passengers. |
| ReprintBoardingPass | Reprint boarding passes for checked-in passengers. |
| ReprintStandbyCard | Reprint standby card for a passenger. |
| RequestForAlternateFlight | Request for reservation change and check-in for alternative flight segment(s). |
| RequestUpgrade | Request for a passenger to be upgraded to a higher class of travel. |
| SelectCheckInSegments | Select flight segments for which the passenger(s) will be checked-in. |
| SelectPassengersToCheckIn | Select the passenger(s) to be checked-in. |
| Unseat | Remove passenger seat allocation, but leave checked in. |
| UpdatePassengerInfo | Passenger information changed, but no seat change. |
| ValidatePassengerSeat | Used when passenger data has changed, e.g.WCHR (wheel chair) added. |
| VolunteerForDeniedBoarding | Identifies a passenger who is willing to be a candidate for denied boarding. |