KEY POINTS:
Indonesia's Supreme Court has rejected Schapelle Corby's final appeal against her 20-year sentence for drug trafficking, says a court source.
The source said the court had rejected the judicial review, with the decision to be officially announced in Jakarta later today.
Corby is serving 20 years in jail for trafficking 4.1kg of marijuana into Bali.
Supreme Court spokesman Nurhadi said the court's decision would be officially announced at 2.30pm Jakarta time (8.30pm NZT).
He refused to provide further details.
Corby applied for the final appeal in August 2006.
The judicial review was Corby's last legal avenue to have her sentence overturned.
The only other avenue is a plea for clemency to Indonesia's president Susilo Bambang Yudhoyono.
The former beauty student has always said she is innocent, and insists she did not know about the 4.1kg of marijuana found in her boogie board bag when she flew into Bali's airport in October 2004.
Corby's judicial review appeal, which included hearings she attended in Denpasar District Court, claimed she was the innocent victim of baggage handlers involved in moving drugs around Australia.
The 19-page document setting out the appeal also claimed mistakes and discrepancies by the judges who convicted her.
Her laywers argued she should have been acquitted because judges did not properly distinguish between importing, owning and using marijuana.
The document said prosecutors could only prove that she was in possession of the drugs, but not that she was importing it.
Corby's lawyers also argued the sentence was too harsh, compared to punishments handed down for similar offences elsewhere in Indonesia.
Corby's stint in Bali's Kerobokan Prison has been surrounded by controversy, including claims aired on Australian television recently that she had dined out with her sister in a Bali restaurant. Corby denied the reports.
- AAP