Australian drug trafficker Schapelle Corby, pictured at Kerobokan prison in Denpasar, on March 11, 2008

This file photo shows Australian drug trafficker Schapelle Corby at Kerobokan prison in Denpasar, during a press visit on March 11, 2008. Australia says it has offered Indonesia a formal guarantee that Corby would comply with parole, in a letter supporting her release from prison.