Canadian authorities have lost track of a former member of Tunisia's regime who was scheduled for deportation.

Belhassen Trabelsi, brother-in-law of Tunisia's former dictator arrived in Montreal more than five years ago but was due to be deported Tuesday.

In a federal court decision last week it was revealed that the lawyer for Trabelsi could not reach his client and that had no idea where he is.

Trabelsi and his family came to Canada in January 2011 as the 23-year-long regime of Zine El Abidine Ben Ali ended in a popular uprising.

He previously applied for - and was granted - permanent residency status but the Canadian government later revoked that status and froze the billionaire's assets, since Trabelsi and his family are accused of stealing billions in state finances.

Ottawa ordered Trablesi deported but he spent years fighting that order, also losing his refugee hearing last year.

In the past had refused to show up at immigration hearings claiming he feared for his safety.

With Trabelsi's whereabouts unknown what happens next in this is case is still to be determined.