A former Solomon Islands prime minister Gordon Darcy Lilo is standing for re-election in a by-election to be held later this month.
The Gizo Kolombangara seat became vacant after its former MP was convicted of bribery.
Jimson Tanangada was found guilty following Mr Lilo's election petition against him after the 2014 polls.
His loss to Tanangada was the biggest upset of the General Elections that year.
The former minister of rural development was convicted for bribery and treating over the supply of food for supporters during campaigning.
Officials from the Solomon Islands Party for Rural Advancement have confirmed Mr Lilo's nomination for the by-election was submitted last week.
His campaign has been launched in the Western Provincial capital Gizo.
Gordon Darcy Lilo was the prime minister of Solomon Islands from 2011 to 2014.
Tanangada is disqualified from contesting the by-election to be held on the 23 May.