Whether you send money from one bank to the other or exchange information or trade securities, at some point in this process a SWIFT message will be exchanged. The acronym stands for Society for Worldwide Interbank Financial Telecommunication and is essentially a protocol for banks to talk to each other. SWIFT MT are the messages that exist since the 70’s and identify the different “sentences” that the banks or other financial institutions will exchange with each other. They are identified by three letters (e.g. MT103, or MT505) each one representing a different message.