Tammy Kingdon, the former partner of bikie Troy Mercanti, has lost her appeal against her conviction for stealing $54,000 from a trust fund.
Kingdon was convicted by a District Court jury in November 2010 of four counts of stealing and one count of property laundering.
The 35-year-old mother of two, who was trustee to the funds, funneled the money from a Coffin Cheaters trust fund set up for the daughters of a slain member and dead associate in 2008 into the purchase of a Balga property.
That property became the clubhouse for ousted Coffin Cheater Mercanti's new club, the Finks.
Kingdon avoided jail and was instead handed a two-year suspended sentence.
When sentencing Kingdon, Judge John Wisbey took into account Kingdon's inability to question her violent partner's instructions which led her to commit her crimes.
In her grounds of appeal, Kingdon's lawyers argued the evidence at trial did not establish that she had stolen money and did not prove beyond a reasonable doubt that she fraudulently converted the property said to be stolen for her own use.
In a unanimous Court of Appeal decision handed down today, three judges rejected Kingdon's legal challenge.
Chief Justice Wayne Martin said Ms Kingdon was not charged with stealing money but rather stealing property having a certain value.
"There was ample evidence to enable the jury to be satisfied beyond reasonable doubt that Ms Kingdon had dealt with the bank credits in a manner which was inconsistent with the rights of the beneficiaries and with an intention to permanently deprive the beneficiaries of those rights, or to use the bank credits for her own purposes," he said.