SWIFT ISO 15022 - Code BENODET Meaning Beneficial Owner Details Usages Message type Field number Tag MT565 (Corporate Action Instruction) 30 16R (Start of Block) MT565 (Corporate Action Instruction) 36 16S (End of Block) MT574.IRSLST (IRS 1441 NRA-IRS Beneficial Owners' List) 14 16R (Start of Block) MT574.IRSLST (IRS 1441 NRA-IRS Beneficial Owners' List) 28 16S (End of Block) MT574.W8BENO (IRS 1441 NRA-Form W8-BEN) 11 16R (Start of Block) MT574.W8BENO (IRS 1441 NRA-Form W8-BEN) 31 16S (End of Block)