ISO 20022 · External code set

System party type codes

Specifies the system party type, as published in an external system party type code set. External code sets can be downloaded from www.iso20022.org.

10 registered codesSource release: August 2026 (v3)
Registered codes in ExternalSystemPartyType1Code. Select a code for its full definition and source details.
CodePublished name and definition
ANSYAncillary System

System in which payments and/or financial instruments are exchanged and/or cleared or recorded, while the ensuing monetary obligations are settled in another system, typically an RTGS system

CSDPCentral Securities Depository Participant

Legal entity or, as the case may be, an individual having a contractual relationship with the CSD for the processing of its securities settlement-related activities in T2S.

CSDYCentral Securities Depository

Infrastructure that holds or controls the holding of physical or dematerialized financial instruments belonging to all, or a large portion of, the investors in a securities market. This effects the centralized transfer of ownership of such securities by entries on its books and records.

ECSDExternal Central Securities Depository

Infrastructure that holds or controls the holding of physical or dematerialized financial instruments belonging to all, or a large portion of, the investors in a securities market. This effects the centralized transfer of ownership of such securities by entries on its books and records. The infrastructure is external to the system executing the instruction.

NCBKNational Central Bank

As system participant, the national central bank is the principal monetary authority of a nation and performs several key functions, including issuing currency and regulating the supply of credit in the economy.

PMBKPayment Bank

Commercial bank used to effect money settlements.

STPRStandard Participant Restricted

Party that owns an account in the system, but only supports a limited range of available use cases in interaction with counterparties.

STPUStandard Participant Unrestricted

Party that owns an account in the system and can interact with the system or counterparties using all use cases available to standard participants.

SYMGSystem Manager

Party that defines the eligibility criteria of the system and is responsible for monitoring, controlling and, if necessary, operating the system. All authorizations are available to the system manager when interacting with the system.

SYOPSystem Operator

Party that operates the system on behalf of the system manager (if different from the system manager) and is provided with specific authorizations by the system manager for this purpose.

Message references 11

Versions listed in the source workbook, including older versions. This list does not establish which messages a bank, network or provider supports.

  • reda.017.001.01Party Report V01
  • reda.019.001.01Securities Account Query V01
  • reda.043.001.02Party Audit Trail Report V02
  • reda.021.001.01Securities Account Report V01
  • reda.043.001.01Party Audit Trail Report V01
  • reda.017.001.02Party Report V02
  • reda.015.001.01Party Query V01
  • reda.041.001.02Party Activity Advice V02
  • reda.014.001.01Party Creation Request V01
  • reda.041.001.01Party Activity Advice V01
  • reda.014.001.02Party Creation Request V02

Source: UsageInMsgs sheet in 2Q2026_externalcodesets_v3.xlsx.