ISO 20022 XML transition

August 27 update: Swift announced it is postponing the address format requirements originally planned for November 2026. We'll provide additional information as we learn more from Swift.

Wells Fargo continues readiness in support of a key industry shift in payments.

As payment innovations reshape the way businesses and people move money, the financial industry is making changes to improve payment processing efficiency and interoperability among payment systems around the world. 

One of the most seismic shifts in the payments landscape is the global adoption of ISO 20022. This financial messaging standard has replaced propriety formats used by payment systems such as Swift, CHIPS, and Fedwire Funds. ISO 20022 is the global standard for most financial messaging and we will be updating mandatory address guidance by the end of 2026.

Wells Fargo is a key participant in the financial industry’s transition to ISO 20022. By leveraging this global standard, financial institutions can improve the speed and predictability of payments, increase transparency for better compliance, and achieve better data analytics and increased operational efficiencies.

Understanding the ISO 20022 transition

What is ISO 20022?

ISO 20022 is a strategic financial industry initiative to replace proprietary message formats with a standard format and definition of data elements. It provides a common language for systems and people to exchange information about financial business. ISO 20022 components are also reusable in other message formats, enabling payment systems to customize data elements to meet their unique needs.

 

Why is it important?

Messages in the ISO 20022 MX format are more likely to post automatically, reducing manual touchpoints while providing more data about each transaction. Potential benefits include the following.

  • Increased payment efficiency and automation. Payments move seamlessly through domestic and cross-border payment systems.
  • Reduced costs and risk. Automated file posting reduces manual intervention for greater operational efficiency and accuracy.
  • Enhanced analytics and reconciliation. Data-rich payments provide consistent, detailed transaction information. ISO 20022 MX messages can contain up to 10,000 KB of transaction information, compared with 100 KB for proprietary messages today.
  • Improved compliance. The common language reduces the chance of false positives during sanctions screening.

Industry requirement for payment addresses

Swift, Fedwire, and CHIPS are removing the unstructured postal address option on November 14, 2026. Payments will need to use a “hybrid” or “structured” address format.

  • Hybrid. Town name (city) and country are in defined elements. Other address information is in free-text address lines.
  • Fully structured. All address information is in clearly defined elements.

Wire payments must include the town name (city) and country for all applicable parties — in the correct fields (elements). If the required information is not provided, the payment won’t be processed successfully. It will be rejected or generate an error.

Payment address format examples

Hybrid
Fully structured

Interim state: Town name and country elements
will be required starting November 2026

Target state: Up to 14 elements

<AdrLine>123 Main Street</AdrLine>
<AdrLine>NY 12345</AdrLine>
<TwnNm>Anytown</TwnNm>
<Ctry>US</Ctry>
<Dept>Corporate Treasury</Dept>
<SubDept>Payments Operations</SubDept>
<StrtNm>Main Street</StrtNm>
<BldgNb>123</BldgNb>
<BldgNm>Riverview Tower</BldgNm>
<Room>1111</Room>
<Flr>11</Flr>
<PstBx>PO Box 456</PstBx>
<PstCd>12345</PstCd>
<TwnNm>Anytown</TwnNm>
<TwnLctnNm>Mysuburb</TwnLctnNm>
<DstrctNm>Whatadistrict</DstrctNm>
<CtrySubDvsn>Anytown</CtrySubDvsn>
<Ctry>US</Ctry>

What we are doing to prepare

Wells Fargo is a founding member of Swift's Payments Market Practice Group (PMPG). We're also an active participant in key working groups that are shaping the transition, including various technical user groups. We have had extensive testing with other clearing and partner banks.

To help ensure we’re well-prepared to support our clients, our wire-initiation services will require town (city) and country starting in September. This will allow readiness of our systems and yours before the industry requirement takes effect.

We encourage you to begin including the required information now to prepare your payment systems for the transition. If you need support, please contact your Wells Fargo representative.

Learn more

Disclosures

  • RO-4040109

  • LRC-0625