Maria Elvira Pinto Exposto has been sentenced to death via hanging after allegeldy trying to move almost 1.1 kilos of crystal meth across the Malaysian border into Melbourne.
The court has previously heard Ms Exposto fell victim to an internet romance scam and that she was tricked into believing she was in Shanghai to lodge documents for her online boyfriend's retirement from service in the U.S. army.
The judge found Exposto had genuinely fallen in love with the man, who groomed her over two years before she was flown to Shanghai and handed a bag containing drugs and asked to take it to Australia.
On Thursday, the acquittal was overturned and Exposto was sentenced to death, according to AFP.
An Australian grandmother has been sentenced to death for smuggling 1.5kg of crystal methamphetamine while traveling from Melbourne to Shanghai. However, prosecutors appealed the decision, which effectively barred her from returning home to Sydney.
Exposto's lawyer, Shafee Abdullah, responded, telling the court that Exposto was an innocent carrier hoodwinked by an internet romance scam.
Exposto, from Sydney, said she did not know the drugs were there, and had voluntarily put the bag through the airport scanner during a stopover in Kuala Lumpur.
Maria Elvira Pinto Exposto, sentenced to death in Malaysia over drugs charges.
An Australian woman has been sentenced to death in Malaysia after a court of appeal found her guilty of smuggling crystal meth.
The three judges sitting in Kuala Lumpur unanimously found the 54-year-old guilty but said she had a right of further appeal on the methamphetamine charges and wished her luck.
She was caught in Kuala Lumpur International Airport in December 2014. She allegedly believed she was submitting paperwork there for her "boyfriend's" retirement.
Ms Exposto's lawyer Shafee Abdullah told her client it was a temporary setback, vowing Exposto would win the appeal, according to the Daily Telegraph.
"Australia opposes the death penalty in all circumstances for all people", Australian Foreign Minister Julie Bishop said in a statement Thursday. Instead, she received two bags, which contained drugs stitched into the lining.
Exposto said she thought she was carrying a bag full of clothes for him.
Malaysia, like other countries in Southeast Asia, imposes harsh penalties for drug offences.
The country carried out four executions in 2017, down from nine the year before.