how to differentiate a genuine and fake R1 driver?

Hi there, just wondering how to differentiate the above. Anyone out there to share with me? Thanks a lot!

i have seen fake titleist vokeys from china. the only reason i know it is fake is because it is too cheap to be real.
it looks exactly like those i have seen in golf house. it is really not easy to spot the difference by untrained eyes.

i have also asked a club fitter previously, if he can tell, he say he will have to either hit it or cut open it to know for sure.

Thanks for yr reply. Any idea is there warranty for TM driver?

serial number , sg logo on shaft if it wasnt change from personal club fitter . you can go and ask taylormade singapore to identify if it is a fake . if you looking to purchase try to purchase from official retailer if you got any doubt - http://www.taylormadegolf.asia/sg/stores.php. 

As common sense if it to real to be true , it most likely to be fake.

serial number under the sole plate. visible only after removing the round compass