If you have bought a fake then you open a NOT AS DESCRIBED CASE to get a refund. It is all set out in the Money Back Guarantee top right of every listing.
If you have not bought but think you have seen a fake, very little point in reporting, ebay gets reports for all sorts of reasons including trying to put cometitors out of Business, so they need convincing that an item is a fake and that is virtually impossible using photos.
