The Director of Public Prosecutions in New South Wales appeals the "inadequacy" of a house arrest sentence handed over to the former archbishop of Adelaide, Philip Wilson, after he concealed child sexual abuse in the Hunter region.
Wilson resigned as archbishop after becoming the oldest Catholic clergyman in the world to be convicted of hiding child sexual abuse earlier this year.
Wilson covered up the crimes of pedophile priest James Fletcher, who was convicted of child sexual abuse in 2004 and died in prison of a stroke in 2006.
Wilson, 67, received one year of house arrest in August and was ordered to stay at his sister's house near Newcastle for at least six months until he qualified for parole.
He immediately filed an appeal against his conviction.
The DPP told AAP on Thursday it had filed an appeal "against the failure of the sentence."
Judge Robert Stone in mid-August discovered that Wilson had shown no remorse or contrition for the cover-up and that his main motive had been to protect the Catholic Church.
The magistrate accepted that it was unlikely that Wilson would again offend, but said that he had to serve a detention period to dissuade others.
When the disgraced cleric left the court to begin his detention at home, one of Fletcher's victims, Peter Gogarty, asked for an apology.
"Philip, can you apologize for what you have done to me and other survivors of child sexual abuse? Philip, please, something, a word of contrition Philip."
Wilson resisted his resignation for months after being convicted of his crime in May, but eventually resigned because he wanted to offer a "catalyst to heal pain and anguish."
It is expected that the DPP's appeal will be mentioned in the Newcastle District Court on September 13.