EBay is an extremely popular online auction website through which any user can buy or sell almost anything, from cars to antique dolls. But with popularity comes problems. Some buyers offer to "settle outside of eBay" (something that is expressly prohibited), while some sellers set up false advertisements and send items that were not what was listed; sometimes these sellers don't send items at all. Here is how to file a complaint on eBay against such members and to report other problems and complaints should they arise.