AML/CFT Financial Crime Fraud Prevention Check Fraud

Treasury Check Verification System (TCVS): Preventing check fraud

Mary Ellen Biery

March 13, 2025

0 min read

The basics of verifying checks for government-issued payments

Fraudsters target government checks at tax time and beyond. Banks and credit unions have several tools, including a new one, to fight fraud through U.S. Treasury check verification.

Key topics covered in this post:

The growing need to verify Treasury checks
Security features to help validate U.S. Treasury checks
Treasury Check Verification System: New payee name validation
How fraud detection software strengthens check authentication

Confirming the legitimacy of tax refund checks

With tax season underway, financial institutions should get ready. They may see more U.S. Treasury checks. Many customers will receive IRS refund payments. Most IRS refunds use direct deposit.

However, fraudsters often target government-issued payments. As a result, Treasury check verification is essential for fraud prevention.

Fortunately, banks and credit unions have several tools available. One option is the Treasury Department’s Treasury Check Verification System (TCVS). It recently added payee name validation. This feature helps institutions confirm Treasury check legitimacy before processing.

Find check fraud faster and smarter.

Abrigo’s Fraud Detection Software harnesses AI-powered inspection, sophisticated machine learning, and a configurable decision engine to help banks and credit unions detect and prevent fraudulent government check and transaction activity more accurately and efficiently.

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The growing need to verify Treasury checks

U.S. Treasury checks remain a favorite target for fraudsters because they are guaranteed funds. In addition, under Regulation CC, the funds are made available to depositors the next business day.

The sheer volume of Treasury checks processed yearly makes authenticating the checks even more challenging. In 2024 alone, the Federal Reserve processed 36 million government checks valued at $1.75 trillion. For many people, a federal tax refund is the largest single check they receive. A fraudulently cashed refund check can create major personal or business harm.

Synthetic ID fraud makes it harder to authenticate Treasury checks

A recent fraud case shows rising synthetic identity theft and other scams. It also confirms the need to verify federal government checks.

In February 2025, a woman was indicted for her role in a U.S. Treasury check fraud scheme. She deposited over $1.9 million in fraudulent Treasury checks. She used stolen identities to complete the deposits. One victim, a woman in Louisiana, expected an IRS refund check. She later learned it was stolen. Someone deposited it using another person’s name. By the time the fraud was detected, the suspect had already transferred thousands of dollars into personal accounts.

In part because of the fraud risks, the IRS recommends people have tax refunds directly deposited. In fact, 97% of refunds are delivered by direct deposit. Even so, 772,000 refunds totaling $674 million have already been issued in checks this year – just through February. In other words, authenticating federal checks is vital.

How to validate Treasury checks using security features

A critical first line of defense against Treasury check fraud is staff vigilance. Tellers and deposit staff should spot counterfeit or altered checks at deposit time.Front-line workers can prevent fraud by manually verifying U.S. Treasury checks for several built-in security features.

The following features help distinguish genuine Treasury checks from counterfeits or altered documents:

Ultraviolet overprinting pattern – An invisible security pattern consisting of “FMS” or "FISCALSERVICE" appears under a black light. Any tampering with the amount box disrupts this pattern.
Treasury seal – The seal appears just right of the Statue of Liberty. It identifies the Bureau of the Fiscal Service. Older checks may still show the Financial Management Service seal.
Bleeding ink – The Treasury seal uses black security ink that turns red when exposed to moisture. This makes tampering and alterations easy to detect.
Microprinting – Some areas of Treasury checks include microprinted words. They look like a solid line to the naked eye. Under magnification, the words become visible. Counterfeit checks will often show a blurred line or series of dots instead.
Watermark – Genuine Treasury checks are printed on special watermarked paper. A check held up to the light shows the “U.S. TREASURY” watermark, and the watermark cannot be photocopied.

Despite these security features, fraudsters have become increasingly sophisticated, using high-resolution printers or altering check details while keeping the legitimate address intact. Mitek is a global leader in mobile deposit, identity verification, and fraud prevention. In a recent blog, the company noted that staff may miss a missing watermark. Staff may also miss missing ultraviolet overprinting. This can happen in a busy branch. It can also happen when using deposit-image capture software for remote deposit.

In addition, fraudsters are constantly refining their tactics. In another recent Treasury check fraud case, two people in California were indicted. One person worked part-time as a bank teller. Prosecutors allege bank fraud and conspiracy. The scheme involved cashing at least 339 stolen U.S. Treasury checks. The checks totaled more than $850,000.

Additional fraud prevention and detection measures are critical.

Treasury Check Verification System (TCVS): How it works & what’s new

Financial institutions can use the Treasury Check Verification System (TCVS) to verify a check.It confirms whether the check is a valid U.S. Treasury check. The Treasury Department’s TCVS is available through a public-facing website and an API (application programming interface).

To find a check in the TCVS, financial institutions need:

Check routing transit number
Check number
Check amount

TCVS history and API updates

However, until November 2024, financial institutions could not confirm whether a payee name matched Treasury records. This created a key gap in check authentication and fraud detection. Late last year, the Treasury unveiled its new payee name validation feature. While this feature is only available through an API, it still provides strong value. It lets financial institutions verify whether the payee name matches the name on record. It helps prevent stolen or altered checks from being cashed.

“This enhanced API portal is another tool for fraud prevention,” said Nancy DeGrandi. She is Manager of Federal Compliance Analysis and Research at Americas Credit Unions. She described the feature on the association’s compliance blog.

Financial institutions that already use the TCVS API portal can now access payee details. She said this applies to checks issued within the past 13 months.

How to enroll in the TCVS API

To enroll in the API portal and gain a key to it, institutions must:

Review the TCVS Terms and Conditions
Provide the financial institution’s name
Complete the signature page
Submitting additional questions and the request via email to [email protected]

DeGrandi said the review process likely takes a few weeks before institutions receive their API credentials.

FedDetect Duplicate Notification

Another government resource can help reduce fraud losses from Treasury checks.
It is the Federal Reserve Bank Service’s FedDetect Duplicate Notification for Check Services (FedDetect Duplicate Notification). It can alert Banks of First Deposit (BOFDs) early. It flags potential duplicate checks. These checks may be processed by the Federal Reserve Banks. In addition to Treasury check reports, FedDetect can generate reports on commercial checks. These checks may be deposited by your institution or another BOFD. Reports are available for the current day or a selected date range.

Government tools still have gaps

While FedDetect Duplicate Notification and TCVS payee ID service add extra layers of security, they are not standalone solutions to Treasury check fraud. Banks and credit unions also need real-time fraud detection. This helps confirm federal checks are not counterfeit or altered before processing.

How fraud detection software strengthens Treasury check security

Abrigo Fraud Detection has partnered with Mitek. They help financial institutions detect fraudulent Treasury checks and other checks at deposit. This includes mobile, ATM, and in-branch deposits. Texas National Bank recently deployed Abrigo’s fraud detection solution. Within two months, the bank identified and stopped over $377,000 in fraudulent check transactions.

Here’s how the solution works:

AI/ML-powered image analysis – It scans Treasury checks and reviews images with AI models. It flags anomalies like wrong formatting, missing security features, or suspicious alterations.

Nationwide fraud data consortium – It leverages a database of known fraudulent checks to identify suspicious transactions.

Configurable rules engine – It enables banks and credit unions to tailor fraud detection settings to their risk tolerance. It also adapts quickly as threats change. Reducing false positives minimizes manual workloads and improves detection accuracy.

Step-up authentication – It involves customers in verifying suspicious transactions for added security.

End-to-end protection – It protects teller systems, mobile deposits, and ATMs. It detects forgeries, flags fraud, and streamlines investigations with precision.

By identifying fraudulent checks quickly, financial institutions can lower fraud losses and protect their customers and members.

Treasury checks: A constant need for authentication

Fraudsters are constantly evolving their tactics and will continue to target checks written by the federal government. Financial institutions can reduce losses from check fraud. They can also protect customers. To do this, they can combine manual security checks, TCVS payee verification, and AI-driven fraud detection.

This blog was written with the assistance of ChatGPT, an AI large language model, and was reviewed and revised by Abrigo's subject-matter expert.

FAQs

What is U.S. Treasury check verification and why does it matter during tax season?

U.S. Treasury check verification is the process of confirming the validity of Treasury-issued checks, such as tax refunds, before funds are made available. Fraud risk increases during tax season due to stolen identities and altered refund checks. Fraud detection software for banks and credit unions helps identify suspicious deposits and reduce losses.

Why are Treasury checks frequently targeted for fraud?

Treasury checks are high-value and widely distributed, making them attractive to fraudsters using stolen identities or counterfeit items. Tax season creates predictable timing and volume, which criminals exploit. Deposit risk management software strengthens monitoring for anomalies tied to refund activity.

How can financial institutions verify U.S. Treasury checks effectively?

Institutions can use official Treasury verification tools, enhanced identification procedures, and transaction monitoring controls to validate checks. Combining verification with behavioral analytics improves detection accuracy. Check fraud prevention software centralizes verification steps and documentation.

What controls should institutions implement to mitigate tax season fraud?

Controls include risk-based holds, enhanced due diligence for new accounts, anomaly detection on refund deposits, and clear escalation procedures. Staff training is also critical during peak periods. Fraud detection and case management software supports consistent workflows and audit-ready documentation.

How does Treasury check verification fit into a broader fraud program?

Treasury check verification is one component of a layered fraud prevention strategy. Institutions should integrate check monitoring with ACH, account takeover, and identity fraud controls. Integrated fraud detection software for banks and credit unions provides centralized oversight across payment channels.

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About the Author

Mary Ellen Biery

Senior Strategist & Content Manager

Mary Ellen Biery is Senior Strategist & Content Manager at Abrigo, where she works with advisors and other experts to develop whitepapers, original research, and other resources that help financial institutions drive growth and manage risk. A former equities reporter for Dow Jones Newswires whose work has been published in

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Treasury Check Verification System (TCVS): Preventing check fraud

The basics of verifying checks for government-issued payments

Confirming the legitimacy of tax refund checks

Find check fraud faster and smarter.

The growing need to verify Treasury checks

Synthetic ID fraud makes it harder to authenticate Treasury checks

How to validate Treasury checks using security features

Treasury Check Verification System (TCVS): How it works & what’s new

TCVS history and API updates

How to enroll in the TCVS API

FedDetect Duplicate Notification

Government tools still have gaps

How fraud detection software strengthens Treasury check security

Treasury checks: A constant need for authentication

FAQs

From detection to disruption: Preventing fraud beyond the check

Panel: Making fraud everyone’s fight

Making it make sense: Documenting your fraud strategy & response

Mary Ellen Biery

Senior Strategist & Content Manager

About Abrigo