SWIFT ISO 15022 - Code NGIV Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning No Admittance Given: Admittance was not given by the investor. Usages Message type Field number Tag MT500 (Instruction to Register) 14 22F (Indicator) MT519 (Modification of Client Details) 13 22F (Indicator)