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This document provides an inventory of ISO 20022 messages, including equivalencies between MX identifiers, ISO 20022 message information, and equivalent DTCC processes.

  pdf Message Inventory and MX/ISO 20022 Equivalencies (157 KB)


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The payment and transfer of securities ownership occurs at DTC, which provides custody and asset servicing for securities issues from more than 170 countries and territories valued at US$73.5 trillion as of 2020. Asset services include: underwriting, corporate actions processing, securities processing, global tax services and issuer services.

The Asset Services section of DTCC's Learning Center provides access to client learning resources supporting ClaimConnectTM, Corporate Actions, Custody Service, Dividend and Income Processing, Global Tax Services, Issuer Services, and Underwriting.


Agent Services

The Agent Services section of this Learning Center facilitates communication with the agent community by providing information and reference documentation that is necessary to interact with The Depository Trust Company (DTC). It offers resources for FAST Agents, assumes you have familiarized yourself with the relevant information available on and are either:

  • ready to apply for FAST Agent membership, or
  • are already a FAST Agent and are seeking resources to assist you in that function.

In the latter case, be sure to check out the Documents tab at the top of this page. Be sure you are logged in to your Learning Center user account to view all of the available information in the Agent Services section.



The ClaimConnect™ service is a solution to the industry's challenges in handling claims that may not be tracked by DTC. These include:

  • Securities Lending (Lends/Borrows)
  • Short Settled Trades (trades outside of the current T+2 settlement cycle)
  • Differences in Tax Rates
  • Not fail tracked (CNS/DTC)

...and other trades that fall outside of DTC's Corporate Actions processing services.

The ClaimConnect™ service eliminates the need for dedicated departments and e-mail reconciliation and is offered by the Depository Trust Company (DTC), a subsidiary of DTCC.


Corporate Actions

The Depository Trust Company (DTC) offers a wide array of services for processing corporate action events for the approximately 1.3 million active securities eligible at the depository. These services include announcing details of upcoming events and providing participants with information about their entitlements, accepting and acting on their instructions, and collecting, allocating, and reporting payments across various corporate action event types, including distributions, redemptions, and reorganizations.


Custody Service

The Depository Trust Company’s (DTC’s) Custody Service enables participants to outsource the safekeeping and processing of physical securities that are not or cannot be held through DTC’s core depository services. Custody’s family of products includes the Branch Deposit Service, New York Window physical clearance and settlement services, Custody Reorganization and Restricted Deposit Services.


Dividend and Income Processing

DTC's Dividend services include announcing, collecting, allocating and reporting dividend, interest and certain principal payments on behalf of its participants with securities in DTC custody.


Global Tax Services

Global Tax Services offers a variety of services for both domestic and international clients including services to provide tax relief on non-U.S. securities, withholding tax services on U.S.-sourced income paid to non-U.S. institutions and a tax reporting data service. Tax Service offerings include:

  • DTC TaxRelief
  • U.S. Tax Withholding Service
  • Domestic Tax Reporting Service (DTax)
  • DTCC’s 305(c) Tax Event Announcements
  • DTCC’s 871(m) Tax Event Announcements



Issuer Services

DTC's Issuer Services provide an array of central communication and information resources for depository-eligible securities that facilitate outreach by issuers to shareholders. Through its efficient, cost-effective and risk-mitigating offerings, Issuer Services help achieve timely and accurate communication among interested parties with respect to securities held and serviced at DTC. 


Underwriting Services

Underwriting is the entry point for depository and book-entry transfer services at The Depository Trust Company (DTC). Services offered through the Underwriting group offer efficiencies in the capital markets and reduce risk to participants by automating and facilitating the distribution and settlement of new and secondary issues.