Where does TXID appear in a message?

For example in camt.110, element InvstgtnData/RsnSubTp/Cd.

TXID Reason Code: Request Tax Identification Number

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

TXID means request tax identification number in the ISO 20022 investigation reason sub type code set. Tax Identification Number is requested.

Code: TXID
ISO name: RequestTaxIdentificationNumber
Status: Registered
Last updated: 2024-02-28

Official definition

Tax Identification Number is requested.

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

Messages and fields that use ExternalInvestigationReasonSubType1Code

Message	Element path
camt.110	InvstgtnData/RsnSubTp/Cd
camt.111	InvstgtnRspn/InvstgtnData/OrgnlInvstgtnRsnSubTp/Cd

TXID in other code sets

TXID questions

What does TXID mean in ISO 20022?: TXID is Request Tax Identification Number in the ExternalInvestigationReasonSubType1Code code set: Tax Identification Number is requested.
Where does TXID appear in a message?: For example in camt.110, element InvstgtnData/RsnSubTp/Cd.

All ExternalInvestigationReasonSubType1Code 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.