Altered Checks and Fraud Liability: What Credit Unions Need to Know

An alteration occurs when someone makes an unauthorized change to a check after it has been issued. The most common example involves changing the dollar amount on the check, but alterations can also include changes to other material terms.

For example, a member may write a check for $10, only to have a fraudster modify the amount before depositing it. When the altered check clears, the resulting loss can lead to disputes between the member, the credit union, and other financial institutions involved in the transaction. Understanding how liability is assigned is critical for handling these situations properly.

One of the key factors in altered check claims is whether the member exercised reasonable care when preparing the check. A member who carefully completes a check, minimizes blank spaces, and promptly reviews account statements may receive stronger protections under the Uniform Commercial Code (UCC). On the other hand, a member who leaves large blank spaces or otherwise creates opportunities for alteration may share responsibility for the resulting loss.

This concept is often referred to as comparative fault. In certain situations, a member's negligence can reduce or eliminate the amount recoverable from another party. For credit unions, evaluating member conduct is an important part of any altered check investigation.

Timely statement review remains one of the strongest fraud prevention tools available to members. When altered items are identified quickly, financial institutions have a better opportunity to investigate the claim, gather documentation, and pursue recovery from other parties if appropriate.

Members who delay reviewing statements may unintentionally limit their ability to challenge fraudulent transactions. Credit unions should continue emphasizing the importance of prompt account monitoring and immediate reporting of suspicious activity.

When an alteration claim is reported, credit unions should avoid making assumptions about liability before completing a thorough review. A proper investigation may include:

Because altered check disputes often involve multiple parties, a careful and documented process can help reduce risk and improve consistency.

While financial institutions play an important role in detecting fraud, many altered check losses can be prevented before the item is ever presented for payment. Member education remains one of the most effective defenses. Encouraging members to complete checks carefully, avoid leaving blank spaces, use permanent ink, and review statements promptly can significantly reduce fraud exposure.

As check fraud schemes continue to evolve, credit unions that understand alteration liability and maintain strong investigation procedures will be better positioned to protect both the institution and its members.

Altered checks are only one piece of today's fraud landscape. Credit unions must also navigate forged signatures, counterfeit checks, unauthorized electronic transactions, wire fraud, and emerging fraud trends.

For a deeper look at fraud liability rules and practical strategies for managing risk, explore Shelli Clarkston's full webinar on fraud liability and fraud prevention for financial institutions.

Who Is Liable? Forgeries, Remotely Deposited Items, Fraudulent ACH, Unauthorized Electronic Withdrawals & More