On a bank notice or statement, “altered/fictitious check” is a return reason code meaning the paying bank refused to honor the item because the document itself looked wrong. Either someone tampered with a real check (altered) or the check was fabricated and never had a legitimate account behind it (fictitious). Banks combine the two labels because, under time pressure, a chemically washed check and a well-made counterfeit can be hard to tell apart.
This is a different problem from “insufficient funds” or “account closed.” Those codes involve real checks that simply can’t be paid. Altered/fictitious means the check is the fraud.
Altered Versus Fictitious
An altered check begins life as a legitimate instrument. Someone then changes it without authorization — most often the payee name, the dollar amount, or both. A $100 check becomes $1,000 with an added zero. A payee line gets rewritten to send the money somewhere else.
The most sophisticated version is check washing. Thieves steal checks from mailboxes and use solvents like acetone or bleach to dissolve the original ink, then fill in a new payee and amount on paper that still carries the real security features and the real signature.1United States Postal Inspection Service. Check Washing Washed checks pass many of the visual tests that catch cruder forgeries.
A fictitious check is fabricated from nothing. No account holder ever wrote it. Fraudsters produce these with consumer printers and desktop software, sometimes copying real bank logos and using real routing numbers paired with account numbers that don’t exist or belong to someone else. Quality ranges from obvious junk on flimsy paper to work convincing enough to fool a teller at a glance. Either way, there is no authorized signature and no funds behind the paper.
Why “Available” Does Not Mean “Cleared”
This is where most people get hurt. Federal law requires banks to make deposited funds available within a set number of business days, typically one to five depending on the check type and your account history.2Federal Reserve Board. Regulation CC (Availability of Funds and Collection of Checks) Available does not mean cleared. A check can take weeks to move through the banking system and come back as fraudulent, long after the money showed up in your balance.
When the check eventually bounces, the bank reverses the deposit and pulls the full amount from your account.3Legal Information Institute. UCC 4-214 – Right of Charge-Back or Refund If you already withdrew or sent that money on, the balance goes negative and you owe the bank. The FTC states it plainly: “Fake checks can take weeks to be discovered and untangled. By that time, the scammer has any money you sent, and you’re stuck paying the money back to the bank.”4Federal Trade Commission. How To Spot, Avoid, and Report Fake Check Scams
The Scams Behind Most Bad Checks
Fraudulent checks rarely appear at random. They arrive embedded in a story designed to make you send real money before the fake one is discovered.
In overpayment scams, a “buyer” sends a check for more than the agreed price and asks you to wire back the difference. The check is fictitious. When the bank reverses it, whatever you wired is gone. In prize and sweepstakes scams, a letter says you’ve won money and encloses a check to cover “taxes” or “processing fees” that you’re told to send back. Same result.4Federal Trade Commission. How To Spot, Avoid, and Report Fake Check Scams
Every version relies on urgency. A stranger who sends you a check and asks you to send money back, for any reason, is running this playbook.
How to Spot a Fraudulent Check
No single test catches every fake. Checking several features together gives a stronger read.
- Paper quality. Legitimate checks use heavy, textured paper. Flimsy or unusually smooth paper suggests a counterfeit printed on standard stock.
- Security features. Real checks include watermarks visible when held to light and microprinting that looks like a solid line to the naked eye but reveals tiny words under magnification. Counterfeits often reproduce that microprinting as a blurred line or a series of dots.5Fiscal Service, U.S. Department of the Treasury. U.S. Treasury Check Security Features
- MICR line. The characters along the bottom edge use magnetic ink that looks dull and lies flat against the paper. Shiny or raised characters point to a home printer.6Office of the Comptroller of the Currency. Check Fraud: A Guide to Avoiding Losses
- Signs of washing or tampering. Discoloration, smudged areas, mismatched ink, disturbed paper texture, faint traces of erased writing, or inconsistent handwriting.6Office of the Comptroller of the Currency. Check Fraud: A Guide to Avoiding Losses
- Routing and account numbers. If the routing number doesn’t match the bank printed on the check, or the logo or address looks slightly off, treat the check as suspicious.
If You Received a Suspicious Check
Do not deposit it. Do not send money back to the sender, no matter what story accompanies the check — overpayment, fees, taxes, none of it changes the outcome. The moment you deposit a fraudulent check and withdraw funds, you become responsible for the full amount when the bank reverses the deposit.
Call your bank and describe what you received. They can try to verify the check and tell you what to do next. Report the scam to the Federal Trade Commission at reportfraud.ftc.gov.7Federal Trade Commission. ReportFraud.ftc.gov If the scheme involved the internet, also file with the FBI’s Internet Crime Complaint Center. If the check was stolen from the mail, the U.S. Postal Inspection Service handles those cases.
Who Pays When a Fraudulent Check Clears
If your bank pays an altered check drawn on your account, it can charge you only for the original amount, not the altered amount. Write a $200 check that gets altered to $2,000, and the bank can debit $200; the remaining $1,800 loss falls on the bank that accepted the altered check or on other banks in the collection chain.8Legal Information Institute. UCC 4-401 – When Bank May Charge Customer’s Account
That protection has limits. If you left signed blank checks lying around, or ignored your statements for months while a fraudster kept cashing altered checks, the bank can argue you contributed to the loss. Where both sides share fault, the loss is split based on who was more responsible.9Legal Information Institute. UCC 4-406 – Customer’s Duty to Discover and Report Unauthorized Signature or Alteration
For a fictitious check you deposited, the math is simpler and harsher. The bank can reverse the provisional credit and pull the full amount back from your account even if you already spent it.3Legal Information Institute. UCC 4-214 – Right of Charge-Back or Refund Expect a returned-item fee on top, typically $20 to $40.
Review Your Statements Quickly
Under the Uniform Commercial Code, you have a duty to review your statements promptly and report unauthorized transactions. If you delay and the bank can show the delay caused it a loss, you can lose the right to recover. There is also a hard cutoff: if you don’t report an alteration within one year of receiving the statement, you’re barred from making a claim against the bank at all.9Legal Information Institute. UCC 4-406 – Customer’s Duty to Discover and Report Unauthorized Signature or Alteration
Prevention If You Still Write Checks
Use a gel pen with pigment-based ink. Unlike standard ballpoint ink, pigment ink soaks into the paper fibers and resists the solvents used in check washing. It won’t stop a fictitious check fabricated from scratch, but it makes altering your real checks much harder.
Mail is the most common source of stolen checks. Drop outgoing checks at the post office counter or in a secure USPS collection box rather than leaving them in a home mailbox with the flag up, and pull incoming mail promptly.10HelpWithMyBank.gov. What Is Check Washing?
Criminal Penalties for the Person Who Passed It
Check fraud triggers several overlapping federal statutes. Prosecutors pick based on how the scheme worked and who was defrauded.
- Counterfeiting government obligations under 18 U.S.C. § 471, including government checks: up to 20 years in prison.11Office of the Law Revision Counsel. 18 USC 471 – Obligations or Securities of United States
- Fictitious financial instruments under 18 U.S.C. § 514, covering the creation, possession, or passing of any fictitious document designed to look like a real financial instrument: a Class B felony carrying up to 25 years.12Office of the Law Revision Counsel. 18 USC 514 – Fictitious Obligations
- Counterfeiting state and private securities under 18 U.S.C. § 513, covering checks drawn on state entities, corporations, or private parties: up to 10 years.13Office of the Law Revision Counsel. 18 USC 513 – Securities of the States and Private Entities
- Bank fraud under 18 U.S.C. § 1344: up to 30 years and fines up to $1,000,000.14Office of the Law Revision Counsel. 18 USC 1344 – Bank Fraud
- Mail fraud under 18 U.S.C. § 1341 when the scheme uses the postal service: up to 20 years, rising to 30 years and $1,000,000 in fines when the fraud affects a financial institution.15Office of the Law Revision Counsel. 18 USC 1341 – Frauds and Swindles
State charges often stack on top. Most states treat check fraud as forgery or theft, with penalties scaling by the dollar amount. Smaller amounts can be charged as misdemeanors; larger schemes as felonies. Victims can also sue for their losses, and several states allow enhanced civil damages — double or triple the check’s face value, plus attorney’s fees — separate from any criminal case.