What is the latest version of auth.026?

The latest version in the ISO 20022 e-Repository release of 24 April 2025 is auth.026.001.04.

What is the root element of auth.026?

The XML document is Document with the namespace urn:iso:std:iso:20022:tech:xsd:auth.026.001.04, and its message element is CcyCtrlReqOrLttr (CurrencyControlRequestOrLetter).

Is there an MT equivalent of auth.026?

No Swift MT message is listed as its direct equivalent on this site. Many ISO 20022 messages have no MT counterpart.

auth: Authorities

auth.026 Currency Control Request Or Letter

Written and maintained by ZagTrader. Last reviewed 21 October 2026. How this page is sourced and checked

auth.026 is the ISO 20022 CurrencyControlRequestOrLetter message in the Authorities business area (auth). The latest version is auth.026.001.04, and 4 versions are in the repository.

Message: CurrencyControlRequestOrLetter
Latest version: auth.026.001.04
Submitting organisation: RU-CMPG
MT equivalent: None listed

In use: published in the current ISO 20022 catalogue.

What auth.026 is for

The CurrencyControlRequestOrLetter message is sent by the reporting party (respectively the registration agent) to the registration agent (respectively the reporting party) to send a currency control related letter or to request for supporting documents.

Definition from the ISO 20022 e-Repository, release of 24 April 2025.

auth.026 versions

Every version published in the e-Repository, newest first. A message keeps its business purpose across versions; each new version is a separate schema with its own namespace.

Version	Registration status	Published in
auth.026.001.04latest	Registered	Latest version set
auth.026.001.03	Registered	Previous version set
auth.026.001.02	Registered	Archive
auth.026.001.01	Registered	Archive

auth.026 message structure

The building blocks of auth.026.001.04 to three levels, with multiplicity ([0..1] optional, [1..1] mandatory, * any number) and the data type or component. Element names and definitions are from the ISO 20022 repository; usage guidelines such as CBPR+ or a market infrastructure's rules can restrict them further.

Document [1..1]
- CcyCtrlReqOrLttr CurrencyControlRequestOrLetter [1..1]
  - GrpHdr Group Header [1..1]CurrencyControlHeader9
    Characteristics shared by all individual items included in the message.
    - MsgId Message Identification [1..1]Max35Text
      Point to point reference, as assigned by the instructing party, and sent to the next party in the chain to unambiguously identify the message.
    - CreDtTm Creation Date Time [1..1]ISODateTime
      Date and time at which the message was created.
    - NbOfItms Number Of Items [1..1]Max15NumericText
      Number of individual items contained in the message.
    - InitgPty Initiating Party [1..1]Party50Choice (choice)
      Party that initiates the instruction.
      - Pty Party [1..1]PartyIdentification272
      - Agt Agent [1..1]BranchAndFinancialInstitutionIdentification8
    - FwdgAgt Forwarding Agent [0..1]BranchAndFinancialInstitutionIdentification8
      Agent which forwards the message.
      - FinInstnId Financial Institution Identification [1..1]FinancialInstitutionIdentification23
      - BrnchId Branch Identification [0..1]BranchData5
  - ReqOrLttr Request Or Letter [1..*]SupportingDocumentRequestOrLetter4
    Supporting document request or letter details.
    - ReqOrLttrId Request Or Letter Identification [1..1]Max35Text
      Unique and unambiguous identification of the supporting document request or the letter.
    - Dt Date [0..1]ISODate
      Date of the supporting document request or the letter.
    - Sndr Sender [0..1]Party50Choice (choice)
      Sender of the request or letter.
      - Pty Party [1..1]PartyIdentification272
      - Agt Agent [1..1]BranchAndFinancialInstitutionIdentification8
    - Rcvr Receiver [0..1]Party50Choice (choice)
      Receiver of the request or letter.
      - Pty Party [1..1]PartyIdentification272
      - Agt Agent [1..1]BranchAndFinancialInstitutionIdentification8
    - OrgnlRefs Original References [0..*]OriginalMessage6
      Provides the references of the original underlying message(s) for which supporting documents are requested or for which the letter is sent.
      - OrgnlSndr Original Sender [0..1]Party50Choice (choice)
      - OrgnlMsgId Original Message Identification [1..1]Max35Text
      - OrgnlMsgNmId Original Message Name Identification [1..1]Max35Text
      - OrgnlCreDtTm Original Creation Date Time [0..1]ISODateTime
      - OrgnlPackgId Original Package Identification [0..1]Max35Text
      - OrgnlRcrdId Original Record Identification [1..1]Max35Text
    - Sbjt Subject [1..1]Max140Text
      Subject of the letter or supporting document.
    - Tp Type [1..1]SupportLetterType1Choice (choice)
      Provides the type of supporting document requested.
      - Cd Code [1..1]ExternalLetterType1Code
      - Prtry Proprietary [1..1]Max35Text
    - Desc Description [0..1]Max1025Text
      Further free format description of the request.
    - RspnReqrd Response Required [1..1]TrueFalseIndicator
      Flag to indicate whether a response is required or not.
    - DueDt Due Date [0..1]ISODate
      Date by which the response to the request is expected.
    - Attchmnt Attachment [0..*]DocumentGeneralInformation5
      Documents provided as attachments to the supporting document request or letter.
      - DocTp Document Type [1..1]ExternalDocumentType1Code
      - DocNb Document Number [1..1]Max35Text
      - DocNm Document Name [0..1]Max140Text
      - SndrRcvrSeqId Sender Receiver Sequence Identification [0..1]Max140Text
      - IsseDt Issue Date [0..1]ISODate
      - URL URL [0..1]Max256Text
      - LkFileHash Link File Hash [0..1]SignatureEnvelopeReference
      - AttchdBinryFile Attached Binary File [1..1]BinaryFile1
    - SplmtryData Supplementary Data [0..*]SupplementaryData1
      Additional information that cannot be captured in the structured elements and/or any other specific block.
      - PlcAndNm Place And Name [0..1]Max350Text
      - Envlp Envelope [1..1]SupplementaryDataEnvelope1
  - SplmtryData Supplementary Data [0..*]SupplementaryData1
    Additional information that cannot be captured in the structured elements and/or any other specific block.
    - PlcAndNm Place And Name [0..1]Max350Text
      Unambiguous reference to the location where the supplementary data must be inserted in the message instance.
    - Envlp Envelope [1..1]SupplementaryDataEnvelope1
      Technical element wrapping the supplementary data.

Have a auth.026 message? Paste it into the parser to see every element with its name and definition, and format checks on BICs, IBANs, dates and amounts.

External code sets used in auth.026

These elements take their values from ISO 20022 external code sets, which are published separately and updated every quarter without a new message version.

auth.026 questions

What is the latest version of auth.026?: The latest version in the ISO 20022 e-Repository release of 24 April 2025 is auth.026.001.04.
What is the root element of auth.026?: The XML document is Document with the namespace urn:iso:std:iso:20022:tech:xsd:auth.026.001.04, and its message element is CcyCtrlReqOrLttr (CurrencyControlRequestOrLetter).
Is there an MT equivalent of auth.026?: No Swift MT message is listed as its direct equivalent on this site. Many ISO 20022 messages have no MT counterpart.

All ISO 20022 messages · ISO 20022 code sets · MT messages

The ISO 20022 message definitions, element 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.