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ExternalPaymentModificationRejection1Code

UM01 Code: Unable To Modify Related Reference

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UM01 means unable to modify related reference in the ISO 20022 payment modification rejection code set. Related transaction reference cannot be modified.

Code
UM01
ISO name
UnableToModifyRelatedReference
Status
Registered
Last updated
2018-05-01

Official definition

Related transaction reference cannot be modified.

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

Messages and fields that use ExternalPaymentModificationRejection1Code

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

UM01 questions

What does UM01 mean in ISO 20022?
UM01 is Unable To Modify Related Reference in the ExternalPaymentModificationRejection1Code code set: Related transaction reference cannot be modified.
Where does UM01 appear in a message?
For example in camt.029, element Sts/RjctdMod/Cd.

All ExternalPaymentModificationRejection1Code 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.