SWIFT ISO 15022 - Code SECDET Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Securities Details Usages Message type Field number Tag MT569 (Triparty Collateral and Exposure Statement) 49 16R (Start of Block) MT569 (Triparty Collateral and Exposure Statement) 59 16S (End of Block)