FORMER Billabong chief executive Matthew Perrin will spend Christmas behind bars after he was found guilty of forgery and defrauding the Commonwealth Bank of millions.
A Brisbane District Court jury found Perrin guilty of forging his former wife's signature on Commonwealth Bank mortgage documents for a $13 million loan.
Perrin had admitted to signing her name but claimed he had her permission.
The court heard Perrin and his then-wife Nicole Bricknell had made millions of dollars when the surfwear company Billabong was floated in 2000.
But Perrin lost his fortune after a number of failed investments.
He approached the Commonwealth Bank in 2008 for loans and credit extensions and forged Ms Bricknell's signature to mortgage their $8 million Gold Coast home that was in her name.
Ms Bricknell denied ever giving him permission to do this.
Perrin declared bankruptcy in 2009.
He will be sentenced in the new year to allow time for a psychological report and character references to be prepared.