New Caledonians whose right to vote in the provincial elections is being challenged have until tomorrow to prove that they are entitled to remain on the roll.
Special commissions led by magistates from France have been vetting the roll as concern over its accuracy festers.
Disagreements over how to interpret and enforce the law have left thousands of people on the list who the pro-independence camp says should be struck off.
Voting rights are restricted to long-term residents in line with a French constitutional amendment accompanying the territory's decolonisation process.
But years have passed without the French state being able to produce a roll beyond reproach, triggering appeals for oversight by the United Nations.
The more than 1,000 still challenged to prove their right to vote have until tomorrow to produce documents showing they had been registered in New Caledonia before 1998.