I saw this from the Yonex website and decide to share to those who don't know

these will only fall for yonex rackets

Look at the logo above your grip, it should be printed clearly.

The serial number, genuine rackets are laser engraved, fake ones are only printed on

the holograph sticker is hard to peel off with your nail, a fake racket's sticker will be easy to peel off.

Hope this helped