SWIFT ISO 15022 - Qualifier BLCA Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Bank Reference Number Usages Message Type Tag Name of the tag MT500 20D ( field number 13 ) Reference MT501 20D ( field number 13 ) Reference MT510 20D ( field number 18 ) Reference MT519 20D ( field number 12 ) Reference