It leads to simplification of an operational environment of work of the organisation and cuts expenses on the maintenance of two various technical infrastructures. Way to the further perfection and decrease in expenses SWIFT (Society for Worldwide Interbank Financial Telecommunications) - the international interbank system of information transfer and fulfilment of payments. Migration from connections to FIN on X.25 to SWIFTNet FIN will allow both to users and most SWIFT to cut the expenses by refusal of use of network X.25 and the out-of-date technologies accompanying the given protocol that already takes place in some countries. Migration from connections to FIN on X.25 to SWIFTNet FIN will allow both to users and most SWIFT to cut the expenses by refusal of use of network X.25 and the out-of-date technologies accompanying the given protocol that already takes place in some countries. Annually through SWIFT passes 2 5 billion payment orders. In this case the connecting organisation bears full responsibility before SWIFT for the organisation of safe work of the connected User.