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ISO 20022 external code set

ExternalPaymentModificationRejection1Code: Payment Modification Rejection Codes

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Specifies the reason for the rejection of a modification, as published in an external payment modification rejection code set.

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

28 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

  • UM01Unable To Modify Related ReferenceRelated transaction reference cannot be modified.
  • UM02Unable To Modify Payment Service LevelService level element of payment type cannot be modified(former UnableToModifyBankOperationCode).
  • UM03Unable To Modify Category PurposeCategory purpose element of payment type cannot be modified (former UnableToModifyInstructionCode).
  • UM04Unable To Modify Requested Execution DateRequestedExecutionDate cannot be modified.
  • UM05Unable To Modify Interbank Settlement DateInterbankSettlementDate cannot be modified (former UnableToModifyValueDate).
  • UM06Unable To Modify Interbank Settlement AccountSettlementAccount cannot be modified (former UnableToModifyInterbankSettlementAccount).
  • UM07Unable To Modify DebtorDebtor cannot be modified.
  • UM08Unable To Modify Debtor AccountDebtorAccount cannot be modified.
  • UM09Unable To Modify Instructed Reimbursement AgentInstructedReimbursementAgent cannot be modified (former UnableToModifyReceiverCorrespondent).
  • UM10Unable To Modify Third Reimbursement AgentThirdReimbursementAgent cannot be modified (former UnableToModifyThirdReimbursementInstitution).
  • UM11Unable To Modify Payment Clearing ChannelClearing Channel element of payment type cannot be modified (former UnableToModifyPaymentScheme)
  • UM12Unable To Modify Creditor Agent AccountCreditor agent account cannot be modified (former UnableToModifyAccountOfBeneficiaryInstitution)
  • UM13Unable To Modify CreditorCreditor cannot be modified.
  • UM14Unable To Modify Creditor AccountCreditor account cannot be modified.
  • UM15Unable To Modify Remittance InformationRemittance information cannot be modified.
  • UM16Unable To Modify Payment PurposePaymentPurpose cannot be modified.
  • UM17Unable To Modify Charge BearerCharge bearer cannot be modified (former UnableToModifyDetailsOfCharges).
  • UM18Unable To Modify Instruction For Next AgentInstruction for next agent cannot be modified (former UnableToModifySenderToReceiver).
  • UM19Unable To Modify Instruction For Creditor AgentInstruction for creditor agent cannot be modified. (former UnableToModifyInstructionForFinalAgent).
  • UM20Instruction Cancelled Submit New InstructionUsed to inform of cancellation and request a new payment instruction. This should only be used if an agent does not want to modify a pending payment.
  • UM21Unable To Modify Submit CancellationModification is not possible and the cancellation is requested.
  • UM22Unable To Modify Debtor Agent AccountDebtor agent account cannot be modified (applicable for direct debits).
  • UM23Unable To Modify Interbank Settlement AmountInterbank settlement amount cannot be modified.
  • UM24Unable To Modify Instruction For Debtor AgentInstruction for debtor agent cannot be modified (applicable for direct debits)
  • UM25Unable To Modify Requested Collection DateRequested collection date cannot be modified (applicable for direct debits)
  • UM26Unable To Modify Payment TypePayment type cannot be modified.
  • UM27Unable To Modify Instructed AmountInstructed or equivalent amount cannot be modified.
  • UM28Unable To Modify PriorityPriority of payment message cannot be modified.

Messages that use ExternalPaymentModificationRejection1Code

MessageElement path
camt.029Sts/RjctdMod/Cd, ModDtls/ModStsRsnInf/Rsn/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.