The Refund Fraud Playbook: Fake Buyers, Empty Boxes, and Chargebacks

The scale is not a rounding error

Chargeback losses hit $33.79 billion worldwide in 2025 across 261 million disputed transactions, and US merchants absorb about $4.61 in total costs for every $1 lost to a chargeback. First-party fraud, where the buyer is the one filing, now represents 36 percent of all reported fraud, up from 15 percent a year earlier. Sift's consumer survey found 16 percent of shoppers admit filing a false fraud claim even though they were satisfied with the purchase.

On marketplaces the pattern is sharper, because the seller is the one who eats the loss while the marketplace keeps its fee. The National Retail Federation's 2025 survey found 65 percent of tracking retailers saw an increase in empty-box returns, 71 percent saw more overstated quantities, and 64 percent saw more decoy returns with counterfeit items inside. The Merchant Risk Council's 2026 report named refund and policy abuse the top attack type, experienced by 41 percent of fraud professionals surveyed. This is not a few bad buyers. It is a tactic with a name and a playbook.

Move one: the box that comes back wrong

The empty-box return is the oldest move and still the most common. The buyer claims the item arrived damaged or wrong, ships something back, and the box holds filler, rocks, or a counterfeit copy of the product. The decoy return works the same way: a fake goes back in the box, the real item stays with the buyer, and the refund lands before anyone opens the package.

The defense is boring and it works. Weigh every return on arrival and log the weight against the shipped weight before the refund is approved. Photograph the opened box. Hold the refund until the item is inspected, and say so in the listing: a marketplace that refunds on tracking delivery alone is paying for empty boxes by policy. A payout freeze after a bot attack follows the same logic. The platform protects buyers first, and the seller who cannot prove what came back loses the argument.

Move two: the refund claimed twice

The double refund uses two channels at once. The buyer opens a return with the seller and a dispute with the bank on the same order, or files with the marketplace and with the payment provider, and collects from whichever side moves first. Refunds go straight from merchant to customer, so the second claim never shows up in a chargeback ratio until the dispute lands.

Stop it with a single source of truth. Every refund, return, and dispute for an order number goes into one record, and support cannot issue a refund on an order with an open dispute without a manager override. The check costs ten seconds. The alternative is paying twice for the same order and finding out a month later from the bank statement.

Move three: the chargeback after the refund

The worst move is the one where the seller did everything right. The buyer gets the refund, then files a chargeback on the same payment anyway. Merchants win only about 41 percent of representment cases, and after fees and second chargebacks the net recovery rate drops to 12 to 18 percent. The card networks side with the cardholder unless the seller's evidence is complete: delivery confirmation, the refund receipt with its date and amount, and the message thread showing the buyer agreed the case was closed.

Keep that evidence attached to the order, not scattered across inboxes. Marketplaces cannot ban every bot, and they cannot tell a real buyer from a refund abuser by looking at an account. What they can do is read a file. The seller whose file is complete wins more of these than the seller whose case is a story.