International ACH Transactions Resource Center

IATs are more common every year, so it’s critical that your financial institution stays up-to-date on secure and efficient IAT processing.


Over the years, Nacha has updated the Nacha Operating Rules to reflect the increasing number of cross-border transfers. We’ve incorporated information on all parties to the transaction in the international payment format, required foreign payments to be classified with the IAT designation, and clarified how IATs with split transactions should be handled.

IATs understanding of these transactions and the rules surrounding their use.

IAT Downloadable Resources
IAT Frequently Asked Questions (FAQs)
IAT Payments scenarios: Domestic or International?
Revised IAT Scenario H - Money TransmittersThird-Party Service Providers
Glossary of International ACH Terms
IAT Executive Summary

IAT Corporate Tool Kit
IAT for Corporate Practitioners, Executive Summary
Sample IAT Corporate Communication to Employees and Vendors
Guidance for IAT Corporate Due Diligence
IAT Payment Scenarios Simplified
IAT FAQs for Corporate Practitioners
IAT Equation
Is My Transaction an IAT?
IAT Readiness Checklist for Corporate Practitioners
IAT Corporate Newsletter Article
IAT Specific Data Elements
IAT Overview for Corporate Practitioners

IAT Industry Guidance
ACH Operations Bulletin - IAT Processing and the "Effect of Illegality" (September 20, 2010)
OFAC Statement on Crediting Beneficiary's Account Prior to OFAC Screening (July 2012)
Revised Guidance on Inbound IAT Debit Processing
     - Nacha Recommendations & Guidance for Gateway Operators & RDFIs
     - OFAC Letter issuing revised guidance on inbound IAT debit processing (March 10, 2009)
OFAC Letter to Nacha (November 2004)
OFAC Domestic ACH Policy

Industry Links
FedGlobal ACH Payments​
ISO Country Codes