SWIFT ISO 15022 - Code VVPR Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Reduced Withholding Tax: Reduced withholding tax rate applies to the option. Usages Message type Field number Tag MT564 (Corporate Action Notification) 57 22F (Indicator) MT566 (Corporate Action Confirmation) 41 22a (Indicator)