I hate to be the bearer of bad news, but I strongly believe that's not Cobain.
Wait for other opinions, because they can vary.
He did sign Kurdt a good amount. Hopefully members will post genuine examples of Kurt Cobain's autograph. That will help you a lot.
If you look closely, the two you posted don't look anything like yours.
Was 3011.PNG from the same source as 3012.PNG?
They passed this, too? I'm honestly not trying to be tough on anyone, I'm just surprised if this (and the other one) were passed by, well, ANYONE!. If PSA did, can you post a picture of the letter?
That was PSA/DNA authenticated? I'm surprised. I'm referring to image 2012.PNG