The ​​Air Transport Settlement System (ATSS) employs electronic forms of ATSS Standard Traffic Documents (ATSS STDs) to issue air transportation contract for passenger, baggage and related services.

The ATSS Standard Traffic Documents comply with international standards. The information related to Form Codes 610 – 619 for different types of the ATSS traffic documents specifying the method of calculation of the check digit is shown in Attachment A to Recommended Practice 1720а, IATA Passenger Services Conference Resolutions Manual (PSCRM). The range of ATSS STDs is allocated depending on the method how transportation/services are issued. For ATSS e-documents with service type codes 81, 76, 75, and 98, as of July 1, 2014, serial numbers are generated from the range of Form Code 10.

E-forms of ATSS standard traffic documents include e-ticket and Electronic Miscellaneous Document (EMD)​​. EMD is used to issue ancillary services provided for passenger, and various fees/charges collected from passenger. The ATSS electronic documents may be used as well to issue the ancillaries.

Number of ATSS e-ticket/EMD is generated in TCH E-ticketing Centre (TCH ETC) from relevant stock of ATSS traffic documents when issuing a transportation/service. Airline is not required to allocate ranges of traffic document numbers between agencies because this function is performed in a centralized manner by TCH ETC.

The issuance of transportation on ATSS STDs shall comply with the provisions of the "ATSS STD Ticketing Handbook" (in Russian language).

For a brief description of the information shown on an ATSS STD, please see these Tips​​.