Check Fraud and Check Washing: Prevention and Detection Guide
Despite the rise of digital payments, check fraud is surging. The Financial Crimes Enforcement Network (FinCEN) reported a 50% increase in check fraud cases in 2024, with check washing — using chemicals to erase and rewrite checks — being the most common technique.
Check fraud involves the unauthorized use, alteration, or creation of checks to steal money. While check usage has declined over the past two decades, the fraud rate per transaction has increased dramatically because criminals focus their efforts where detection is lowest. Check washing, check counterfeiting, and paperhanging (writing checks on closed accounts) are the primary forms. The United States Postal Service reported over 300,000 mail theft complaints in 2024, many involving checks stolen from mailboxes.
Check washing is the most common type of check fraud. Criminals steal checks from mailboxes or outgoing office mail, then use household chemicals — acetone, bleach, or even nail polish remover — to dissolve the ink, leaving the signature and bank information intact but allowing them to rewrite the payee name and amount. The altered check can then be deposited into a different account. The technique works because many people use gel pens whose ink is water-soluble, and even some secure checks can be washed. The victim may not discover the fraud until their bank statement arrives weeks later, at which point the money and the criminal are long gone.
How to Protect Yourself from Check Fraud
Use black gel ink pens — these are the most resistant to check washing. Better yet, use specialized check fraud prevention pens, which are available at office supply stores. Never mail checks from your home mailbox with the flag up — this signals to thieves that there is outgoing mail. Deposit checks at the post office or in a secure blue collection box. Switch to electronic payments whenever possible — wire transfers, ACH, and electronic bill pay are more secure than paper checks. Review your bank statements immediately each month and promptly report any suspicious checks. Use positive pay services if available — this system matches each check presented against a list of checks you have issued, flagging mismatches. If you must mail a check, hand it to a postal worker inside the post office.
What to Do If You Are a Victim
If a check you wrote or received is altered and cashed fraudulently, contact your bank immediately. Under the Uniform Commercial Code, banks have a duty to verify the payee endorsement. You may be entitled to a refund if the bank processed an altered check. File a report with the US Postal Inspection Service if the check was stolen from the mail. File a police report and report the fraud to the FTC. Notify the check recipient that the payment was compromised. To prevent recurrence, consider placing a security alert on your checking account, switching to electronic payments, and using a service that alerts you when checks are presented for payment. Banks are increasingly adopting image analysis technology to detect altered checks, but consumer vigilance remains the most effective defense.
FAQs
What is check washing?
Check washing is a technique where criminals use chemicals to remove the ink from a stolen check, leaving the signature and bank routing number intact. They then rewrite the check with a different payee and amount and cash it fraudulently.
Are digital checks safer than paper checks?
Yes. ACH transfers, wire transfers, and electronic bill payments are significantly more secure than paper checks. They cannot be stolen from the mail, cannot be washed, and offer better fraud protection than paper checks. Most banks offer free electronic bill pay services.
Is the bank liable for check fraud?
Under UCC rules, banks are generally liable for processing checks with forged endorsements or altered amounts if the customer reports the fraud in a timely manner. However, customers may be held liable if they were negligent (e.g., leaving blank checks accessible). Report fraud within 30 days of your bank statement.