Business Overpayment / Refund Scam

This scam targets businesses that accept payments from new or one-off customers — freelancers, small retailers, service providers, and businesses selling higher-value goods online. A scammer poses as a customer, places an order or requests services, and then sends payment for more than the amount owed, either by cheque, wire transfer, or card. They then contact the business, apologizing for the 'mistake' and asking for the difference to be refunded promptly, often to a different account or by a different payment method than the original payment.

The business, seeing the payment appear to clear or the funds show as received, refunds the overpaid amount in good faith. Days later, the original payment is reversed — the cheque bounces, the wire transfer is recalled as fraudulent, or the card payment is charged back — leaving the business having sent real money to the scammer while receiving nothing genuine in return.

This scam relies heavily on the gap between a payment appearing to clear (funds showing as available) and a payment being irrevocably settled (the point at which it can no longer be reversed), which for cheques and some transfer methods can be days or even weeks — far longer than most businesses realize.

The scam begins with what looks like a normal transaction: a new customer places an order, commissions work, or purchases an item, often at a legitimate-looking listing price. Payment is sent — commonly a cheque for a business that still accepts them, or a bank transfer — for an amount noticeably higher than the actual invoice or price.

The scammer then contacts the business, explaining the overpayment as an honest mistake (a bookkeeping error, a shipping fee wrongly added twice, a decimal point mistake) and requests that the excess be sent back, frequently asking for it to go to a different account, a wire transfer, or even a gift card equivalent, and often pressing for speed since 'the funds are needed urgently'.

Because the original payment appears to have cleared — the cheque shows as deposited, or the transfer shows as received in the account balance — the business processes the refund before the original payment has actually and fully settled. Days later, the bank reverses the original payment: the cheque is discovered to be fraudulent and bounces, or the transfer is recalled after being reported as unauthorized or fraudulent by the real account holder it came from. The business is left having sent the refund from its own genuine funds while the original payment vanishes, a net loss equal to the refunded amount.

The scam exploits a widespread misunderstanding of banking mechanics: most business owners assume that once a payment shows as received or a cheque shows as deposited, the money is truly theirs, when in fact many payment methods can still be reversed for days or weeks after appearing to clear. Because the scammer frames the situation as their own honest mistake, the business feels a natural social obligation to correct it quickly and professionally, especially with an apologetic, courteous tone that discourages suspicion.

The urgency pressure ('I need this back today, it was meant for rent') adds a further push toward fast action before the business has had time to independently confirm the original payment has fully and irreversibly settled. Because the scam involves what looks like an ordinary customer service situation rather than an unusual request, it doesn't trigger the same alarm as a cold-call fraud attempt would.

A small online business receives an order along with a cheque payment for significantly more than the invoiced amount. The buyer emails shortly after, apologizing for accidentally writing the cheque for the wrong amount and asking that the difference be wired back to a different account they specify, citing an urgent need for the funds. The cheque appears to have been deposited and the funds show as available in the business's account, so the business wires back the overpaid amount as requested. Roughly ten days later, the bank notifies the business that the original cheque has been returned as fraudulent, reversing the deposit and leaving the business having sent real funds to the scammer while the original payment was never genuine.

I'm so sorry, I think I sent you too much by mistake. Could you please refund the difference of [amount] to this account instead?

My accountant made an error on the payment amount. I need the excess [amount] returned urgently, ideally today, to a different account since mine is temporarily frozen.

I accidentally added an extra zero to the payment. Please send back [amount] via wire transfer as soon as possible.

Apologies, I sent the wrong amount for the order. Could you refund the balance to my colleague's account since it's easier for me right now?

The funds should have cleared by now — please process the refund of [amount] before end of day so I can cover an urgent expense.

Never refund an overpayment until the original payment has fully and irrevocably cleared — for cheques this can take one to two weeks depending on jurisdiction and bank, and for bank transfers it means confirming with your own bank that the funds cannot be recalled, not simply that they appear in the account balance. If in doubt, ask your bank directly how long a given payment type can still be reversed before treating it as final.

When a customer claims to have overpaid, treat the situation with the same verification rigor as any unusual payment request: confirm the original payment's status with your bank first, and if a refund is genuinely warranted, refund it only to the original payment source and method, never to a different account, different person, or via a different payment method such as gift cards or cryptocurrency, which real customers rarely request and which cannot be recovered.