According to research, on average, retailers receive around 16% of items purchased back as a return. The NRF (National Retail Federation) says retailers are losing around 10% of the price of returned items to fraud. It’s costing retailers billions globally.

https://internetretailing.net/guest-comment/guest-comment-fraud-as-a-service-the-underground-network-causing-havoc-with-retailers-return-policies/