The band's Facebook page posted a response to a Daily Mail article that dripped in sarcasm. It read: "It is true, Kurt is alive".
"He needed time to learn to play the guitar with his right hand. Finding left-handed guitars is not easy. We are so happy to have him back and forgive him for all of the sadness that we have held so deeply in our hearts," the page administrator wrote.
After fans revolted calling the post "disrespectful", a second message appeared: "I thought people like conspiracy theories. I can't do anything right!"
The original post linked to a Daily Mail article in which fans saw a video of Peruvian singer Ramiro Saavedra covering Nirvana's Come As You Are and mistook him for Cobain.
Kurt Cobain was found dead at his home in 1994 and police ruled the cause of death to be suicide.