An Adelaide accountant jailed for more than 17 years for money laundering and drug trafficking has had five years cut from her sentence.
Abigail Huyen Tran appealed against both her conviction and sentence after being found guilty in the District Court on 21 charges.
In its judgment on Wednesday, the Court of Criminal Appeal rejected her bid to overturn her conviction but cut her head sentence from 18 years to 12 years and six months.
It also cut her non-parole-period from 11 and a half years to just seven years.
Tran used her experience as an accountant to launder hundreds of thousands of dollars in cash from heroin and amphetamine deals carried out by other members of a drug trafficking syndicate
She argued that her convictions were unsafe and that, in relation to some of the charges, it had not been proved that she knew the money was tainted.
In presenting the court's reasons, Justice Ann Vanstone said the grounds of appeal against conviction were not made out.
However, she said the appeal against the sentence was allowed with Tran's jail term ruled to be manifestly excessive.
She said the reduced term would also provide better parity with another woman jailed over the same trafficking operation.