What is the latest version of acmt.018?

The latest version in the ISO 20022 e-Repository release of 24 April 2025 is acmt.018.001.04.

What is the root element of acmt.018?

The XML document is Document with the namespace urn:iso:std:iso:20022:tech:xsd:acmt.018.001.04, and its message element is AcctMndtMntncAmdmntReq (AccountMandateMaintenanceAmendmentRequest).

Is there an MT equivalent of acmt.018?

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

acmt: Account Management

acmt.018 Account Mandate Maintenance Amendment Request

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

acmt.018 is the ISO 20022 AccountMandateMaintenanceAmendmentRequest message in the Account Management business area (acmt). The latest version is acmt.018.001.04, and 4 versions are in the repository.

Message: AccountMandateMaintenanceAmendmentRequest
Latest version: acmt.018.001.04
Submitting organisation: Swift
MT equivalent: None listed

In use: published in the current ISO 20022 catalogue.

What acmt.018 is for

The AccountMandateMaintenanceAmendmentRequest message is sent from an organisation to a financial institution as part of the account maintenance process. It is sent in response to a request from the financial institution to send additional information. Usage: this update is only about mandate information.
If modification codes are not used: the organisation will specify under the “Mandate” and “Group” tags the complete information as it should be in the financial institution’s records after processing the update request.
If modification codes are used (in that case, they must be used everywhere): the organisation will specify under the “Mandate” and “Group” tags which elements must be added, deleted, modified, or if they are unchanged.
It is not possible to update the account characteristics or organisation information with this message.

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

acmt.018 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
acmt.018.001.04latest	Registered	Latest version set
acmt.018.001.03	Registered	Previous version set
acmt.018.001.02	Registered	Archive
acmt.018.001.01	Registered	Archive

acmt.018 message structure

The building blocks of acmt.018.001.04 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]
- AcctMndtMntncAmdmntReq AccountMandateMaintenanceAmendmentRequest [1..1]
  - Refs References [1..1]References4
    Set of elements for the identification of the message and related references.
    - MsgId Message Identification [1..1]MessageIdentification1
      Identifies a message by a unique identifier and the date and time when the message was created by the sender.
      - Id Identification [1..1]Max35Text
      - CreDtTm Creation Date Time [1..1]ISODateTime
    - PrcId Process Identification [1..1]MessageIdentification1
      Identifies a process by a unique identifier and the date and time when the first message belonging to the process was created by the sender.
      - Id Identification [1..1]Max35Text
      - CreDtTm Creation Date Time [1..1]ISODateTime
    - AttchdDocNm Attached Document Name [0..*]Max70Text
      File name of a document logically related to the request.
  - Fr From [0..1]OrganisationIdentification39
    Identifies the business sender of the message, if it is not the account owner or account servicing financial institution.
    - AnyBIC Any BIC [0..1]AnyBICDec2014Identifier
      Business identification code of the organisation.
    - LEI LEI [0..1]LEIIdentifier
      Legal entity identification as an alternate identification for a party.
    - Othr Other [0..*]GenericOrganisationIdentification3
      Unique identification of an organisation, as assigned by an institution, using an identification scheme.
      - Id Identification [1..1]Max256Text
      - SchmeNm Scheme Name [0..1]OrganisationIdentificationSchemeName1Choice (choice)
      - Issr Issuer [0..1]Max35Text
  - CtrctDts Contract Dates [0..1]AccountContract2
    Specifies target dates.
    - TrgtGoLiveDt Target Go Live Date [0..1]ISODate
      Date on which the account and related basic services are expected to be operational for the account owner.
    - TrgtClsgDt Target Closing Date [0..1]ISODate
      Date on which the account and related services are expected to cease to be operational for the account owner.
    - UrgcyFlg Urgency Flag [0..1]YesNoIndicator
      Indicator that the account opening/maintenance/closing process needs to be treated urgently, that is, sooner than the terms established by the...
  - UndrlygMstrAgrmt Underlying Master Agreement [0..1]ContractDocument1
    Account contract established between the organisation or the group to which the organisation belongs, and the account servicer.
    - Ref Reference [1..1]Max35Text
      Account contract established between the organisation or the group to which the organisation belongs, and the account servicer.
    - SgnOffDt Sign Off Date [0..1]ISODate
      Signoff date of the document.
    - Vrsn Version [0..1]Max6Text
      Identification of the version of the contract.
  - AcctId Account Identification [1..*]AccountForAction1
    Unique and unambiguous identification of the account between the account owner and the account servicer.
    - Id Identification [1..1]AccountIdentification4Choice (choice)
      Unique and unambiguous identification for the account between the account owner and the account servicer.
      - IBAN IBAN [1..1]IBAN2007Identifier
      - Othr Other [1..1]GenericAccountIdentification1
    - Ccy Currency [1..1]ActiveCurrencyCode
      Medium of exchange of value.
  - AcctSvcrId Account Servicer Identification [1..1]BranchAndFinancialInstitutionIdentification8
    Unique and unambiguous identifier of a financial institution, as assigned under an internationally recognised or proprietary identification scheme.
    - FinInstnId Financial Institution Identification [1..1]FinancialInstitutionIdentification23
      Unique and unambiguous identification of a financial institution, as assigned under an internationally recognised or proprietary identification...
      - BICFI BICFI [0..1]BICFIDec2014Identifier
      - ClrSysMmbId Clearing System Member Identification [0..1]ClearingSystemMemberIdentification2
      - LEI LEI [0..1]LEIIdentifier
      - Nm Name [0..1]Max140Text
      - PstlAdr Postal Address [0..1]PostalAddress27
      - Othr Other [0..1]GenericFinancialIdentification1
    - BrnchId Branch Identification [0..1]BranchData5
      Identifies a specific branch of a financial institution.
      - Id Identification [0..1]Max35Text
      - LEI LEI [0..1]LEIIdentifier
      - Nm Name [0..1]Max140Text
      - PstlAdr Postal Address [0..1]PostalAddress27
  - OrgId Organisation Identification [1..1]OrganisationIdentification39
    Identification of the organisation requesting the change.
    - AnyBIC Any BIC [0..1]AnyBICDec2014Identifier
      Business identification code of the organisation.
    - LEI LEI [0..1]LEIIdentifier
      Legal entity identification as an alternate identification for a party.
    - Othr Other [0..*]GenericOrganisationIdentification3
      Unique identification of an organisation, as assigned by an institution, using an identification scheme.
      - Id Identification [1..1]Max256Text
      - SchmeNm Scheme Name [0..1]OrganisationIdentificationSchemeName1Choice (choice)
      - Issr Issuer [0..1]Max35Text
  - Mndt Mandate [0..*]OperationMandate6
    Information specifying the account mandate.
    - ModCd Modification Code [0..1]Modification1Code
      Specifies the type of change.
    - Id Identification [1..1]Max35Text
      Unique and unambiguous identification of the mandate.
    - AplblChanl Applicable Channel [1..*]Channel2Choice (choice)
      Channel for which the operation mandate is valid.
      - Cd Code [1..1]CommunicationMethod3Code
      - Prtry Proprietary [1..1]Max35Text
    - ReqrdSgntrNb Required Signature Number [1..1]Max15PlusSignedNumericText
      Number of required and necessary signatures by the mandate.
    - SgntrOrdrInd Signature Order Indicator [1..1]YesNoIndicator
      Indicator whether a certain order of signatures has to be respected or not.
    - MndtHldr Mandate Holder [0..*]PartyAndAuthorisation6
      Holder of the mandate.
      - ModCd Modification Code [0..1]Modification1Code
      - PtyOrGrp Party Or Group [1..1]PartyOrGroup3Choice (choice)
      - SgntrOrdr Signature Order [0..1]Max15PlusSignedNumericText
      - Authstn Authorisation [1..1]Authorisation2
    - BkOpr Bank Operation [1..*]BankTransactionCodeStructure4
      Bank operation allowed by a mandate.
      - Domn Domain [0..1]BankTransactionCodeStructure5
      - Prtry Proprietary [0..1]ProprietaryBankTransactionCodeStructure1
    - StartDt Start Date [0..1]ISODate
      Specifies the date when the mandate becomes valid.
    - EndDt End Date [0..1]ISODate
      Specifies the date when the mandate stops to be valid.
  - Grp Group [0..*]Group5
    Definition of a group of parties.
    - ModCd Modification Code [0..1]Modification1Code
      Specifies the type of change.
    - GrpId Group Identification [1..1]Max4AlphaNumericText
      Specifies the identification of the group.
    - Pty Party [1..*]PartyAndCertificate7
      Specifies a party and related certificate.
      - ModCd Modification Code [0..1]Modification1Code
      - Pty Party [1..1]PartyIdentification272
      - Cert Certificate [0..1]Max10KBinary
  - DgtlSgntr Digital Signature [0..*]PartyAndSignature4
    Contains the signature with its components, namely signed info, signature value, key info and the object.
    - Pty Party [1..1]PartyIdentification272
      Entity involved in an activity.
      - Nm Name [0..1]Max140Text
      - PstlAdr Postal Address [0..1]PostalAddress27
      - Id Identification [0..1]Party52Choice (choice)
      - CtryOfRes Country Of Residence [0..1]CountryCode
      - CtctDtls Contact Details [0..1]Contact13
    - Sgntr Signature [1..1]SkipPayload
      Signature of a party.
  - 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 acmt.018 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 acmt.018

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

acmt.018 questions

What is the latest version of acmt.018?: The latest version in the ISO 20022 e-Repository release of 24 April 2025 is acmt.018.001.04.
What is the root element of acmt.018?: The XML document is Document with the namespace urn:iso:std:iso:20022:tech:xsd:acmt.018.001.04, and its message element is AcctMndtMntncAmdmntReq (AccountMandateMaintenanceAmendmentRequest).
Is there an MT equivalent of acmt.018?: 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.