The documents in question were filed in 2009, when Love's 19-year-old daughter Frances Bean Cobain sought to secure a restraining order against her mother.
In her deposition, Cobain claims that her mother's ongoing drug use led to the family cat and dog dying after ingesting Love's prescription pills. She expressed concern over her mother's drug habit, as well as her penchant for starting fires while smoking in bed.
The court info was recently cited in a new e-book entitled Courtney Comes Clean, written by The Fix editor Maer Roshan. The unauthorized biography chronicles the Hole singer's troubled career.
Love's attorney James Janowitz told the New York Post: "I was the lawyer who worked on these [family court] proceedings in Los Angeles, and the filing was confidential and sealed as is customary in these kind of cases. I don't know how they were disclosed. When I find out what happened, we will take the appropriate legal action."
The 47-year-old musician recently won another court case earlier this year, after her landlord filed suit in response to property damage.