SWIFT ISO 15022 - Code ERUN Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Restriction Exchange: Exchange of Restricted to Unrestricted (or vice versa). Usages Message type Field number Tag MT564 (Corporate Action Notification) 51 22F (Indicator) MT564 (Corporate Action Notification) 57 22F (Indicator) MT566 (Corporate Action Confirmation) 37 22F (Indicator)