Don't even bother, I actually saw on live news where the big bike companies along with US Customs are going after and confiscating any of the bikes that are coming through from China. I guess its a million dollar industry for the chinese to make the fake big name bikes. I heard that the big name companies actually purchase some of these fakes and investigate/tear down the frame, and I was shocked to see the welds on them (the ones they showed on tv).
What's even worse is when some people purchased used fakes and later find out that they bought a bogus frame/bike. I heard a few people found out by sending in there broken frame to the manufacturer and then being told that its not original.
Be careful when purchasing used! as well.
Here is an article for some to see on this subject: