Svetlana, some definitions from our glossary... Authenticated message: "A SWIFTNet FIN message that has been authenticated between the sender and the receiver. Confirmation is done by means of an authenticator result contained in the Message Authentication Code trailer (MAC trailer) of the mess...

1) SWIFT cannot support the practice of using MT 799s for communication in lieu of an existing message type, in this case the MT 707 (LC amendment). 2) As someone correctly stated, if a specific message type exists (MT 707), then this one should be used. The scope of the MT 799 says that it is used ...