What are ACH fraud prevention and Positive Pay controls?
ACH fraud prevention and Positive Pay controls are proactive banking and security measures that verify the legitimacy of every check and electronic debit before money leaves your account. Positive Pay matches checks against a list you provide, while ACH filters allow only pre-approved debits to clear. Together they close the most common payment-fraud paths.
As an MSP that supports finance, healthcare, and local government, we see how sophisticated payment fraud has become. Criminals no longer target only physical mail; they use business email compromise (BEC) and vendor impersonation to redirect legitimate payments. Protecting cash flow requires a layered defense that combines bank-side controls with disciplined identity and access security. If you are building that program, start with Datapath and our financial services solutions.
What payment fraud threats should finance teams plan for?
Two threat categories drive most losses, and they often work together.
- Check fraud: check washing, counterfeiting, and alteration of legitimate checks.
- ACH fraud: unauthorized debits, vendor impersonation, and payroll diversion that move funds electronically.
The connective tissue is usually a compromised or spoofed email account. The FBI’s Internet Crime Complaint Center reports that business email compromise remains one of the costliest fraud categories reported to it.1 That is why payment controls have to extend past the bank portal into the email and identity layer, a theme we cover in business email compromise response planning.
How should we implement effective payment controls?
A workable program layers banking controls, approval discipline, and cybersecurity so no single failure can release funds.
| Control type | Action item | Benefit |
|---|---|---|
| Positive Pay | Provide your bank a daily list of issued check details (number, amount, payee). | Blocks unauthorized or altered checks. |
| ACH filters and blocks | Set rules so only pre-approved originators can debit the account. | Prevents unauthorized electronic withdrawals. |
| Dual authorization | Require two-person approval for payments and changes to vendor banking details. | Mitigates internal and external fraud risk. |
| Cybersecurity controls | Enforce MFA and use dedicated, hardened workstations for banking. | Protects credentials from theft and session hijacking. |
NACHA, which administers the ACH network’s operating rules, requires originating institutions to use commercially reasonable fraud-detection systems and supports account validation as a standard control.2 Pair these banking controls with the cybersecurity practices in our vendor risk management guidance and GLBA Safeguards Rule checklist.
How often should we review payment controls?
Treat payment controls as a recurring operating rhythm, not a one-time setup. We recommend reviewing transaction limits, approved ACH originators, check-issuance feeds, and user access at least quarterly, and immediately after any vendor banking-detail change, staff departure, or suspected fraud attempt. The FTC’s Safeguards Rule similarly expects financial institutions to monitor and adjust controls as risks change.3
Why Datapath for payment fraud prevention?
Datapath delivers Accountability-as-a-Service™: we don’t just manage IT, we help finance-sensitive organizations connect payment controls, identity security, and evidence-backed operations. We align cybersecurity with the frameworks our clients answer to so a control is something you can prove, not just claim.
If your team is hardening its financial security posture, review our cybersecurity services and contact Datapath to assess your current payment controls and build a proactive defense.
FAQ: ACH fraud prevention and Positive Pay
What is the difference between Positive Pay and ACH filters?
Positive Pay verifies check details against a list you submit to the bank, while ACH filters control which electronic originators are permitted to debit your account. Most organizations need both.
Can Positive Pay stop all fraud?
No. Positive Pay is effective against unauthorized or altered checks, but it should be one layer in a broader strategy that includes MFA, dual authorization, and staff awareness training.
What is the most common ACH fraud tactic?
Business email compromise remains a leading tactic, where attackers impersonate a vendor or executive to request a fraudulent payment or change vendor banking details.
How often should we review our payment controls?
Quarterly is a practical baseline, with an immediate review after any vendor banking change, employee departure, or suspected fraud attempt.
Does Datapath help with compliance?
Yes. We help organizations align IT and security controls with frameworks such as GLBA, the FTC Safeguards Rule, HIPAA, and CMMC, including the secure handling of financial data.
Sources
- FBI Internet Crime Complaint Center (IC3) — Business Email Compromise
- NACHA — ACH operating rules and fraud detection
- FTC — Standards for Safeguarding Customer Information (Safeguards Rule)
