SWIFT ISO 15022 - Code CASHSET1 Meaning Cash Settlement Details Usages Message type Field number Tag MT504 (Collateral Proposal) 72 16R (Start of Block) MT504 (Collateral Proposal) 79 16S (End of Block) MT505 (Collateral Substitution) 64 16R (Start of Block) MT505 (Collateral Substitution) 71 16S (End of Block)