SWIFT ISO 15022 - Code NOFX Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning No Foreign Exchange Instruction: A foreign exchange instruction from you is missing. Usages Message type Field number Tag MT537 (Statement of Pending Transactions) 19 24B (Reason) MT537 (Statement of Pending Transactions) 65 24B (Reason) MT548 (Settlement Status and Processing Advice) 12 24B (Reason) MT549 (Request for Statement/Status Advice) 17 24B (Reason)