SWIFT ISO 15022 - Code FXPRTY1 Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning FX Parties 1 Usages Message type Field number Tag MT307 (Advice/Instruction of a Third Party FX Deal) 13 16R (Start of Block) MT307 (Advice/Instruction of a Third Party FX Deal) 15 16S (End of Block)