What does ISWS mean in ISO 20022?

ISWS is Invalid Settlement Window in the ExternalRejectedReason1Code code set: Invalid settlement window for settlement instruction.

ExternalRejectedReason1Code

ISWS Reason Code: Invalid Settlement Window

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

ISWS means invalid settlement window in the ISO 20022 rejected reason code set. Invalid settlement window for settlement instruction.

Code: ISWS
ISO name: InvalidSettlementWindow
Status: Registered
Last updated: 2021-08-31

Official definition

Invalid settlement window for settlement instruction.

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

Messages and fields that use ExternalRejectedReason1Code

Message	Element path
reda.058	versions 001.01

ISWS in other code sets

ISWS in ExternalStatusReason1Code

ISWS questions

What does ISWS mean in ISO 20022?: ISWS is Invalid Settlement Window in the ExternalRejectedReason1Code code set: Invalid settlement window for settlement instruction.

All ExternalRejectedReason1Code 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.