How does a fake check cashing scam work?
Fake check cashing scams exploit the banking system's provisional crediting policy: a fraudulent check appears to clear before your bank confirms it is bogus, and any cash sent against it comes out of your own account.
Last reviewed: 10 June 2026
Explanation
Someone — typically a buyer for a marketplace sale, a new employer, or a lottery administrator — sends you a check or money order. The amount is correct or has an 'overpayment'. Your bank accepts the deposit and makes the funds available within one to two business days, before the check has been verified as genuine with the issuing bank.
During this availability window, the fraudster instructs you to send some or all of the funds elsewhere — a wire transfer, gift card codes, or a payment to a third party. You do so, believing the funds are real. Several days or weeks later, the check is returned as counterfeit or the account it was drawn on has no funds. Your bank reverses the deposit, leaving your account in deficit by the full check amount plus any transfer you made.
The loss is yours: the money transferred is gone, and the bank expects you to cover the returned check. The check itself may look entirely authentic — correct paper stock, routing numbers, bank logos — because high-quality check templates are widely available.
This scam applies wherever money is received from a stranger before being forwarded: overpayment in private sales, nanny or personal assistant hiring scams, mystery shopper schemes, and lottery wins all use this mechanism.
Common red flags
- A check arrives from someone you have never met, often for more than agreed
- You are instructed to send part of the money to a third party before the check clears
- The check arrives unexpectedly for a lottery, job, or sale you had almost forgotten
- The issuing bank is in a different country or a state you would not expect
- The payer is unusually insistent that you send the money quickly
What to do now
- Ask your bank specifically whether the check has been verified — availability of funds does not mean verified
- Wait for full verification before sending any money related to the deposit
- For private sales, accept only payment methods you can verify as irreversible before handing over goods
- Report fraudulent checks to your bank, national postal inspection service, and consumer protection authority
- If you have already sent funds, contact your bank fraud team immediately
Frequently asked questions
How long does it actually take for a check to clear fully?
Provisional availability is typically one to two business days. Full verification that funds genuinely exist can take several weeks, particularly for checks drawn on foreign banks.
Can a cashier's check be fake?
Yes. Cashier's checks can be convincingly forged. The appearance of a bank's logo and a legitimate-seeming routing number does not mean the check is genuine. Call the issuing bank directly to verify.
What is a mystery shopper check scam?
A fake mystery shopping company sends a large check and instructs the 'shopper' to cash it, buy gift cards, and rate the experience — providing the card codes. The check bounces; the shopper is left responsible for the full amount.