Society for Worldwide Interbank Financial Telecommunications (SWIFT) is a nonprofit cooperative of member banks serving as a worldwide interbank telecommunications network based in Brussels, Belgium. It is the primary system employed by financial institutions worldwide to transmit either domestic or international payment instructions. (Federal Reserve-Commercial Bank Examination Manual)

SWIFT MT Formats

Customer Payments & Cheques

• MT100-199

Financial Institution Transfers

• MT200-299,

Treasury Markets Foreign Exchange, Money Markets & Derivatives 

• MT300-341,
• MT350-399,

Collections & Cash Letters

• MT400-499,

Securities Markets

• MT500-518,
• MT519-543,
• MT544-567,
• MT568-599,

Treasury Markets

• MT600-699, Precious Metals
• MT643-699, Syndications

Documentary Credits & Guarantees

• MT700-799,

Travellers Cheques

• MT800-899,

Cash Management & Customer Status

• MT900-999,

Common Group Messages

• MTn90-n99.