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This phase places increased emphasis on validated authorization and stronger internal controls, including formalized approval and authentication requirements tied directly to fraud prevention expectations.
What’s Effective Now in Phase 2
Beginning June 19 (with practical implementation occurring after the federal holiday on June 22), Phase 2 expands fraud monitoring requirements to:
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All remaining non-consumer ACH Originators (regardless of origination volume),
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TPSs,
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TPSPs and
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ODFIs supporting these entities.
These participants must now establish and implement risk-based processes and procedures reasonably designed to identify ACH Entries initiated as a result of fraud, including Entries authorized under false pretenses.
This is not a “check-the-box” requirement; it is intentionally flexible and broad. Each organization must tailor its fraud monitoring approach to its origination patterns, risk exposure and operational structure. Notably, while RDFIs are expected to monitor for suspicious inbound activity, liability and warranties still largely rest with the ODFI and upstream participants.
What “Risk-Based Fraud Monitoring” Really Means
The Rule does not prescribe a specific system, vendor or checklist. Instead, it expects participants to design controls that match their environment. At a minimum, financial institutions and their Originators should be able to answer the following questions:
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How do we detect unusual or new payment behavior?
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How do we validate changes to payment instructions?
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Where are we most exposed to external compromise (email, portals, file transfers)?
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How quickly can we identify and respond to suspicious Entries?
This is where many financial institutions will need to evolve from static controls to behavior-aware monitoring.
The Highest-Risk Moment: New Receiver Activity
One of the most consistent fraud entry points is the introduction of a new or modified Receiver account. This is also where controls are often weakest. A strong risk-based program should treat new Receiver setup or account changes as elevated risk events requiring additional verification, such as:
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Independent due diligence on the Receiver relationship,
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Formal, non-email-based authorization of account details,
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Out-of-band verification (e.g., calling a known, trusted number on file, not one provided in the request),
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Dual control approval prior to activation,
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Temporary holds or review periods for first-time payments and
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Optional use of prenotification or Micro-Entry validation to confirm account validity.
Organizations should implement a structured authorization and approval framework for Receiver setup and any changes to account information. This should require:
- Signed or similarly authenticated authorization (not unsecured channels such as email),
- Tiered approvals based on dollar thresholds, with higher-value relationships subject to enhanced review under dual control and
- Ensuring all changes are supported by legally valid authorization that meets evidentiary standards for dispute or legal review.
BEC schemes continue to succeed largely because account changes are accepted without independent verification. Closing that gap is one of the most effective fraud prevention steps available.
What ODFIs, TPSPs and TPSs Should Be Doing Now
It is critical for ODFIs and TPSPs to move beyond awareness and into operational readiness. Key focus areas include:
- Defining Monitoring Controls. Organizations should implement processes that identify:
- New or first-time Receivers,
- Sudden changes in payment behavior,
- Unusual dollar amounts or frequency shifts,
- New account instructions tied to existing vendors and
- High-risk transmission channels (especially email-based requests).
- Enhancing Exception Handling. Not every anomaly is fraud, but every anomaly should be reviewable. Organizations should have clear escalation paths for:
- Suspicious file submissions,
- Account change requests lacking proper validation and
- Duplicate or conflicting payment instructions.
- Strengthening Vendor and Originator Oversight. While the Rule does not explicitly require Originator audits, ODFIs and TPSPs may increasingly:
- Review Originator fraud controls during onboarding,
- Request documentation of risk-based procedures,
- Incorporate fraud monitoring expectations into contracts and
- Conduct periodic reviews for higher-risk Originators.
This creates a stronger “shared responsibility” model across the ACH chain.
Technology vs. Process: What Really Needs to Change?
Some financial institutions may find that existing tools are sufficient if properly configured while others may need enhancements. In practice, effective fraud monitoring typically combines:
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Transaction pattern analysis (rules or anomaly detection),
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Strong identity and authorization workflows,
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Workflow-based review tools for exceptions,
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Internal training for operations and ACH staff and
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Communication protocols between ODFIs and Originators.
Technology alone is not the requirement, but it often becomes necessary to scale consistent review processes.
Final Thoughts
Organizations that delay implementation risk more than non-compliance — they risk exposure to preventable fraud losses. The most effective programs will not be the most complex, but rather the ones that focus on the highest-risk moments in the ACH lifecycle, particularly new Receiver setup, account change validation and first-time payments to new or modified beneficiaries.
By strengthening controls in these areas and ensuring risk-based monitoring is embedded into daily operations, exposure to ACH fraud can be significantly reduced while maintaining compliance with the new Rule.
The expectation is clear: fraud prevention is now a shared, active responsibility across the entire ACH Network.
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