ISO 20022 · External code set

Payment modification rejection codes

Specifies the reason for the rejection of a modification, as published in an external payment modification rejection code set. External code sets can be downloaded from www.iso20022.org.

28 registered codesSource release: August 2026 (v3)
Registered codes in ExternalPaymentModificationRejection1Code. Select a code for its full definition and source details.
CodePublished name and definition
UM01Unable To Modify Related Reference

Related transaction reference cannot be modified.

UM02Unable To Modify Payment Service Level

Service level element of payment type cannot be modified(former UnableToModifyBankOperationCode).

UM03Unable To Modify Category Purpose

Category purpose element of payment type cannot be modified (former UnableToModifyInstructionCode).

UM04Unable To Modify Requested Execution Date

RequestedExecutionDate cannot be modified.

UM05Unable To Modify Interbank Settlement Date

InterbankSettlementDate cannot be modified (former UnableToModifyValueDate).

UM06Unable To Modify Interbank Settlement Account

SettlementAccount cannot be modified (former UnableToModifyInterbankSettlementAccount).

UM07Unable To Modify Debtor

Debtor cannot be modified.

UM08Unable To Modify Debtor Account

DebtorAccount cannot be modified.

UM09Unable To Modify Instructed Reimbursement Agent

InstructedReimbursementAgent cannot be modified (former UnableToModifyReceiverCorrespondent).

UM10Unable To Modify Third Reimbursement Agent

ThirdReimbursementAgent cannot be modified (former UnableToModifyThirdReimbursementInstitution).

UM11Unable To Modify Payment Clearing Channel

Clearing Channel element of payment type cannot be modified (former UnableToModifyPaymentScheme)

UM12Unable To Modify Creditor Agent Account

Creditor agent account cannot be modified (former UnableToModifyAccountOfBeneficiaryInstitution)

UM13Unable To Modify Creditor

Creditor cannot be modified.

UM14Unable To Modify Creditor Account

Creditor account cannot be modified.

UM15Unable To Modify Remittance Information

Remittance information cannot be modified.

UM16Unable To Modify Payment Purpose

PaymentPurpose cannot be modified.

UM17Unable To Modify Charge Bearer

Charge bearer cannot be modified (former UnableToModifyDetailsOfCharges).

UM18Unable To Modify Instruction For Next Agent

Instruction for next agent cannot be modified (former UnableToModifySenderToReceiver).

UM19Unable To Modify Instruction For Creditor Agent

Instruction for creditor agent cannot be modified. (former UnableToModifyInstructionForFinalAgent).

UM20Instruction Cancelled Submit New Instruction

Used 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 Cancellation

Modification is not possible and the cancellation is requested.

UM22Unable To Modify Debtor Agent Account

Debtor agent account cannot be modified (applicable for direct debits).

UM23Unable To Modify Interbank Settlement Amount

Interbank settlement amount cannot be modified.

UM24Unable To Modify Instruction For Debtor Agent

Instruction for debtor agent cannot be modified (applicable for direct debits)

UM25Unable To Modify Requested Collection Date

Requested collection date cannot be modified (applicable for direct debits)

UM26Unable To Modify Payment Type

Payment type cannot be modified.

UM27Unable To Modify Instructed Amount

Instructed or equivalent amount cannot be modified.

UM28Unable To Modify Priority

Priority of payment message cannot be modified.

Message references 7

Versions listed in the source workbook, including older versions. This list does not establish which messages a bank, network or provider supports.

  • camt.029.001.08Resolution Of Investigation V08
  • camt.029.001.11Resolution Of Investigation V11
  • camt.029.001.09Resolution Of Investigation V09
  • camt.029.001.10Resolution Of Investigation V10
  • camt.029.001.14Resolution Of Investigation V14
  • camt.029.001.12Resolution Of Investigation V12
  • camt.029.001.13Resolution Of Investigation V13

Source: UsageInMsgs sheet in 2Q2026_externalcodesets_v3.xlsx.