The 60-year-old will face the Victorian Court of Appeal on Friday morning where three justices are set to hand down their decision, following his three-day appeal hearing in September.
He is seeking to overturn his drug-trafficking and importation convictions, claiming they were tainted because of barrister-turned-informer Nicola Gobbo.
Ms Gobbo was registered as a Victoria Police informer from 2005 to 2009 and was acting as Mokbel's lawyer for four years before he fled to Greece in 2006.
She continued to advise him when he was extradited back to Melbourne in 2008.
Mokbel's barrister Tim Game SC argued his client suffered a substantial miscarriage of justice because he was misled and deceived for years before pleading guilty to drug offences in 2011.
Mr Game also said the evidence against Mokbel had been "corrupted" because Ms Gobbo encouraged two of her clients to make statements against him.
Prosecutor David Glynn said Ms Gobbo was not acting as Mokbel's legal representative at the time he pleaded and, while the cases against him were weakened, they were still viable.
He also argued there should be a retrial if Mokbel's appeal was successful, but Mr Game said that should not happen because Mokbel had already served a large portion of his jail term.
The 60-year-old had spent nearly 18 years behind bars before he was released on bail in April.
In granting his bail application, Court of Appeal President Karin Emerton described Mokbel's appeal chances as "very strong".
She stated Mokbel was deliberately misled and deceived as to the strength and nature of the prosecution case when he pleaded guilty to the drug offences.
Since his release, Mokbel has been following stringent bail conditions including daily police reporting and an 8pm to 6am curfew.
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