There are many counterfeit Yonex products on the market, especially on online shopping sites (including auctions and flea markets).
These counterfeit products are difficult to distinguish from genuine products just by looking at them. Not only do they differ in specifications and performance from genuine products, but they are also inferior in quality and safety, and there is a risk of injury or accident.
An example of a genuine product and a counterfeit product
Genuine Yonex racquet
Counterfeit (sticker can be easily peeled off)
It should be difficult to remove the hologram sticker on genuine racquets due to the special glue used. With counterfeit racquets, the hologram sticker is easy to peel off with your nail.
Source: https://www.yonex.com/us/spotting-counterfeits/