SWIFT ISO 15022 - Qualifier FRAQ Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Mailing Address Usages Message Type Tag Name of the tag MT500 17B ( field number 39 ) Flag MT501 17B ( field number 39 ) Flag MT519 17B ( field number 37 ) Flag MT574.IRSLST 17B ( field number 18 ) Flag MT574.W8BENO 17B ( field number 15 ) Flag