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With 900 million eligible voters, ensuring enough electronic voting machines, security forces and election officials would require extensive planning and resources.

But in the weeks following the election, he made repeated claims on social media questioning the results of the vote and the integrity of Brazil's electronic voting system.

But the election commission has rejected allegations of bias and denied Zourabichvili's allegations of so-called carousel voting in Georgia's new electronic voting system, insisting it is impossible to vote more than once.

But criticism of the conduct of the election has come from both the US and EU, which have both called for an independent investigation of violence and intimidation, as well as alleged flagrant violation of the new electronic voting process.

At the time it was difficult to tell why, she said, but it then became clear the identity cards were being used for so-called carousel voting in Georgia's new electronic voting system - "when one person can vote 10, 15, 17 times with the same ID".