---
title: Airline Extension Overview
slug: public-apis/airline-extension-overview
createdAt: 2026-03-10T12:35:18.974Z
---

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**Topic type: Concept**

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**Purpose**: Legacy Airline Fraud API overview, differences, and hashing requirements. 

**Audience**: API integrators and client developers. 

**Applies to**: Legacy Airline clients implementing via API.

**Does not apply to**: Universal APIs, any other industry, or airline clients who opt for a non-API integration.
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The Universal Airline API extends the Universal Fraud API shared transaction model with flight itinerary, segment, and passenger context.

Airline-specific information is supplied through the `flightInformation` structure while all core transaction data remains consistent with other Universal Fraud APIs.

## Airline Extension Model

The Universal Airline API adds the following to the shared transaction structure:

- Flight Information
- Flight Segments
- Passenger Information

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<font color="#386B84">**Note**</font>: See [Airline Complete Request Structure](docId\:eKwdYSuxpCnRt7NYjKM1L) for the full path.
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## Makes Airline Different

Air risk assessment often depends on data that is specific to airline transactions, such as:

- **PNR / itinerary characteristics** (ticket type, third‑party booking indicators)
- **Segment-level context** (route info, departure/arrival airports and timestamps, award ticket indicators)
- **Passenger-level context** (names, DOB, loyalty, passport where applicable)

These structures help the platform evaluate the event with the appropriate domain signals.

## Hashing Requirements

The Air Fraud API follows the platform hashing rules. Fields designated as hash-required must be hashed before submission, including:

- `giftCardNumber`
- `hashedPassword`

See: **[Hashing Requirements](docId\:yuGHwVL8eOn7vCgSwPcd3)** (Constraint) and **[Accertify Hash Algorithm](docId\:rKIK1Lb6EUUWsz3sxPCe-)** (Reference).

## Field Reference

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[Airline preAuth risk scoring](docId\:iSNMplbjcREPqhtCKcVd-)
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[Airline postAuth risk scoring](docId\:LYgQEhGcCmNGg-y71Rzql)
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[Airline authorization update](docId:5fijwAAQn-khaZVGUyk3q)
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[Airline authorization update](docId:5fijwAAQn-khaZVGUyk3q)
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[Airline fulfillment update](docId:_J_l60hdKsg-59NoI49MF)
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