Got a package you didn't order? It could be a scam By: CNN Shutterstock (CNN) -- Most people who buy things online just have to worry about their deliveries being delayed or never arriving. But some people are dealing with a different problem altogether: getting weird stuff like hair clippers, face creams and sunglasses they never even ordered at all. The Federal Trade Commission and cyber experts have been warning consumers about these deliveries, which can be part of something known as "brushing" scams. Here's how these scams work: Third-party sellers on Amazon, eBay and other online marketplaces pay people to write fake, positive reviews about their products, or do it themselves. To be able to post the reviews, these so-called "brushers" need to trick the site into making it appear that a legitimate transaction took place. So they'll use a fake account to place gift orders and address them to a random person whose name and address they find online. Then, instead of actually mailing the item for which they want to post a review, the brushers will send a cheap, often lightweight item that costs less to ship.