How to Avoid Check Fraud and Detect Altered Checks

Tax season often brings an increase in check fraud activity, and we are currently seeing specific patterns in several markets. Based on recent site visits and bankwide data, fraud trends include altered checks, fraudulent IDs, and tax refund schemes that can put MSBs at risk.

Fraud Trends We Are Seeing Now

Fraud is not evenly distributed across the country. Recent analysis shows:

  • South Florida, Georgia, Pennsylvania, New Jersey: Higher occurrences of altered checks and double presentment
  • Georgia: More fraudulent IDs
  • Northeast Area: Spike in large tax refund checks for young individuals
  • East Coast overall: Higher volume of fraud compared to other regions

Understanding these localized trends can help MSBs tailor their detection and prevention efforts based on where their business operates.

Why Fraud Is Often Missed

In busy MSB settings, tellers and staff are under pressure to process customers quickly. Fast service is important, but it should not come at the expense of proper verification. Common reasons fraud is missed include:

  • Rushing to clear lines during peak hours
  • Focusing only on the ID and not the instrument
  • Not using available tools like UV lights or thorough inspection methods

Slowing down when suspicious signals appear can prevent significant losses later.

Detecting Chemical Alterations with Simple Tools

One of the most common fraud methods involves chemical alteration (sometimes called “check washing”), where fraudsters remove original payee information and rewrite it.

How to detect it:

  • Use a UV light, which costs less than $30 and is easy to use
  • Hold the check under UV light before acceptance
  • Look for:


    • Security features glowing consistently
    • Areas where ink or paper looks inconsistent
    • Borders or payee lines that glow differently from the rest of the check

Areas that glow differently often indicate tampering.

Even if the check has no embedded security feature, an altered area will reflect under UV light in a way that the original paper will not.

Behavioral Red Flags to Watch

Fraud prevention is not only about tools. People exhibit behavior that often signals something is wrong:

Watch for customers who:

  • Avoid eye contact
  • Provide unsolicited, overly friendly explanations
  • Insist on hurrying rushing you
  • Offer reasons that don’t make sense for the transaction

These behaviors, when combined with instrument anomalies, are stronger indicators of fraud.

Money Mule and Tax Refund Schemes

In some cases, the check is real, but the transaction context is not. A common example seen in Michigan:

  • Younger individuals cashing unusually large tax refunds
  • Refund amounts not aligned with typical income for that age group
  • Refunds linked to questionable tax preparers

These patterns suggest the check itself may be authentic, but the process that generated it was fraudulent. The bank will eventually identify the issue, but MSBs may face loss if the check is returned.

Why Slowing Down Protects Your Business

Slowing down and asking questions helps you protect your business from future exposure.

It’s natural to want to avoid losing a small fee by turning away a suspicious check. However, a rushed decision can expose your business to a much higher loss when a check is returned or fails later verification.

Protecting your business means:

  • Slowing down when something doesn’t feel right
  • Asking more questions
  • Using tools like UV light to confirm legitimacy
  • Prioritizing compliance over short-term fee income

When fraud is prevented at the front line, the long-term financial health of your business is protected.

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