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ExternalPersonIdentification1Code

CUST Code: Customer Identification Number

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CUST means customer identification number in the ISO 20022 person identification code set. Number assigned by an issuer to identify a customer.

Code
CUST
ISO name
CustomerIdentificationNumber
Status
Registered
Last updated
2009-04-01

Official definition

Number assigned by an issuer to identify a customer.

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

Messages and fields that use ExternalPersonIdentification1Code

MessageElement path
pacs.002TxInfAndSts/StsRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd, OrgnlGrpInfAndSts/StsRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd, TxInfAndSts/OrgnlTxRef/CdtrSchmeId/Id/PrvtId/Othr/SchmeNm/Cd, TxInfAndSts/OrgnlTxRef/Dbtr/Pty/Id/PrvtId/Othr/SchmeNm/Cd
pain.002GrpHdr/InitgPty/Id/PrvtId/Othr/SchmeNm/Cd, OrgnlGrpInfAndSts/StsRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd, OrgnlPmtInfAndSts/StsRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd, OrgnlPmtInfAndSts/TxInfAndSts/StsRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd
pacs.004TxInf/RtrRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd, OrgnlGrpInf/RtrRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd, TxInf/OrgnlTxRef/CdtrSchmeId/Id/PrvtId/Othr/SchmeNm/Cd, TxInf/RtrChain/Dbtr/Pty/Id/PrvtId/Othr/SchmeNm/Cd
camt.056Case/Cretr/Pty/Id/PrvtId/Othr/SchmeNm/Cd, Assgnmt/Assgnr/Pty/Id/PrvtId/Othr/SchmeNm/Cd, Assgnmt/Assgne/Pty/Id/PrvtId/Othr/SchmeNm/Cd, Undrlyg/TxInf/CxlRsnInf/Orgtr/Id/PrvtId/Othr/SchmeNm/Cd
camt.029Assgnmt/Assgnr/Pty/Id/PrvtId/Othr/SchmeNm/Cd, Assgnmt/Assgne/Pty/Id/PrvtId/Othr/SchmeNm/Cd, ModDtls/Assgnr/Pty/Id/PrvtId/Othr/SchmeNm/Cd, ModDtls/Assgne/Pty/Id/PrvtId/Othr/SchmeNm/Cd
pacs.008CdtTrfTxInf/Dbtr/Id/PrvtId/Othr/SchmeNm/Cd, CdtTrfTxInf/Cdtr/Id/PrvtId/Othr/SchmeNm/Cd, CdtTrfTxInf/InitgPty/Id/PrvtId/Othr/SchmeNm/Cd, CdtTrfTxInf/UltmtDbtr/Id/PrvtId/Othr/SchmeNm/Cd
pacs.009CdtTrfTxInf/UndrlygCstmrCdtTrf/Dbtr/Id/PrvtId/Othr/SchmeNm/Cd, CdtTrfTxInf/UndrlygCstmrCdtTrf/Cdtr/Id/PrvtId/Othr/SchmeNm/Cd, CdtTrfTxInf/UndrlygCstmrCdtTrf/InitgPty/Id/PrvtId/Othr/SchmeNm/Cd, CdtTrfTxInf/UndrlygCstmrCdtTrf/UltmtDbtr/Id/PrvtId/Othr/SchmeNm/Cd
pain.001PmtInf/Dbtr/Id/PrvtId/Othr/SchmeNm/Cd, GrpHdr/InitgPty/Id/PrvtId/Othr/SchmeNm/Cd, PmtInf/UltmtDbtr/Id/PrvtId/Othr/SchmeNm/Cd, PmtInf/CdtTrfTxInf/Cdtr/Id/PrvtId/Othr/SchmeNm/Cd

And 174 more messages: see the ExternalPersonIdentification1Code page.

CUST in other code sets

CUST questions

What does CUST mean in ISO 20022?
CUST is Customer Identification Number in the ExternalPersonIdentification1Code code set: Number assigned by an issuer to identify a customer.
Where does CUST appear in a message?
For example in camt.056, element Case/Cretr/Pty/Id/PrvtId/Othr/SchmeNm/Cd.

All ExternalPersonIdentification1Code codes · ISO 20022 code sets

The ISO 20022 code 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.