American Express Direct Airline Data Airline data must be included in both the authorization request and the capture request. Airline Data Processing The following table describes various features for airline data processing with American Express Direct. Table 8 Airline Data Processing Features for American Express Direct Feature Description Supported Card Type American Express Travel Legs Maximum number of travel legs: 4Numbering for the travel legs: 0 to 3 You must include information for at least the first leg of the trip (leg 0). You must use consecutive numbers for the legs; do not skip a number. If you skip a number, CyberSource ignores the legs that follow the skipped number. Specification used by CyberSource to implement airline data processing For authorizations: American Express Global Credit Authorization Guide, ISO 8583:1993 (version 1) dated April 2011 For captures and credits: American Express Global Financial Settlement Guide dated April 2011