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ISO 20022 external code set

ExternalSystemPartyType1Code: System Party Type Codes

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Specifies the system party type, as published in an external system party type code set.

Definition from the ISO 20022 External Code Sets, 2Q2026 (published 28 Aug 2026).

10 codes in use. External code sets are published outside the message schemas and updated every quarter, so a new code can appear without a new message version.

Codes

  • ANSYAncillary SystemSystem 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 ParticipantLegal 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 DepositoryInfrastructure 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 DepositoryInfrastructure 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 BankAs 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 BankCommercial bank used to effect money settlements.
  • STPRStandard Participant RestrictedParty that owns an account in the system, but only supports a limited range of available use cases in interaction with counterparties.
  • STPUStandard Participant UnrestrictedParty that owns an account in the system and can interact with the system or counterparties using all use cases available to standard participants.
  • SYMGSystem ManagerParty 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 OperatorParty 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.

Messages that use ExternalSystemPartyType1Code

MessageElement path
reda.014Pty/Tp/Cd
reda.015SchCrit/Tp/Cd
reda.017RptOrErr/PtyRpt/PtyOrErr/SysPty/Tp/Cd
reda.019SchCrit/PtyTp/Cd
reda.021RptOrErr/SctiesAcctRpt/SctiesAcctOrErr/SctiesAcct/PtyTp/Cd
reda.041PtyActvty/Chng/Rcrd/Tp/Od/Cd, PtyActvty/Chng/Rcrd/Tp/New/Cd
reda.043RptOrErr/PtyAudtTrlRpt/PtyAudtTrlOrErr/AudtTrl/Rcrd/Tp/Od/Cd, RptOrErr/PtyAudtTrlRpt/PtyAudtTrlOrErr/AudtTrl/Rcrd/Tp/New/Cd

All ISO 20022 code sets · ISO 20022 messages

The ISO 20022 code set names, code values, names and definitions on this page are reproduced from material published at iso20022.org under the ISO 20022 Intellectual Property Rights policy. This is not the official source: the up-to-date ISO 20022 standards and repository material are published only at iso20022.org. Explanations in our own words are by ZagTrader. ZagTrader is not affiliated with or endorsed by ISO or Swift.