I received my Razer Blackshark V2 headset a few minutes ago and opened the box. When I went to register the product, I was told that it had already been registered (probably by third parties). The advertiser told me in a message that this could be a security measure by Razer, since third parties were selling serial codes on the internet (bad actors). I fear that mine was one of these cases.
Serial code for my product: HN2121D13405496

