DTCC is undertaking a multi-year effort to transform its systems into a more advanced, modular platform. The modernized DTC Settlement Web system will support lightweight messaging through ISO20022 format only, through distributed messaging (MQ IPT) and file (sFTP) channels. Settlement reports (data output) will also be harmonized with updated formats.
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Equities Clearing & Settlement Transformation: Functional Change Document
Settlement ISO 20022 Message Flows UAT

ISO 20022 Message Specification Deliver Order UAT

For more information about upcoming changes and timelines, see the Future of Clearing & Securities Services resources.