"I did have presidential approval [of renouncing citizenship] but I'm not obliged to bring it forward," Ms Zaki told ABC radio on Monday.

"Why can't my word be taken? Why do I have to go through the extra step as a migrant? That's not fair."

The Liberal candidate for Canberra moved to Australia from Afghanistan as a child. Her parents and grandparents born in Afghanistan. While she has submitted some documentation to the electoral commission, she has so far refused to reveal further documents that she says show the process was complete.

An expert in diplomacy and Afghan politics believes she could be in trouble saying it is "absolutely clear" the document she sent to the electoral commission was not a finalised renunciation.

Ms Zaki has denied that she is an Afghani citizen, but has refused to release correspondence with the country's government that showed the citizenship had been renounced.

In order for Afghan citizenship to be renounced, it must be approved by the nation's president on the recommendation of a council of ministers.

Ms Zaki said the issue of dual citizenship was an attempt to cast doubt on her campaign.

"I've answered this question [of dual citizenship] the best I could and the Prime Minister has answered it. No answer that we give is enough," she said.

"I wont be sidetracked and I'll keep doing. To be honest, this is an attempt to cast doubt on my campaign.

"Unfortunately, a person from a refugee and migrant background is having to go through all of this, because people couldn't pick anything else to pick on."

Ms Zaki was required to lodge documents to the Australian Electoral Commission about her citizenship renunciation like other candidates, after changes were brought in following a string of MPs being ineligible for parliament due to dual citizenship.

The Liberal candidate said she was confident should the matter be referred to the High Court.

"If the matter goes to court, I'm very confident of a successful outcome, so I have no issues or concerns about it, and I'm looking forward to the outcome of it," she said.

Professor William Maley from the Australian National University isn't convinced the translated document confirms Ms Zaki's citizenship of Afghanistan is actually renounced.

"It's a recommendation that the renunciation be approved. It is very clearly not a document that gives final effect to a request for renunciation because under Afghan citizenship law that requires a presidential order, which normally requires six months to be produced," Professor Maley said.

Professor Maley also pointed out an issue in the translation of the original document from the Afghan government. The English version says "the applicant's national identity is no longer valid" but Professor Maley said the full phrase was the national identity card.

The cancellation of a national identity card could be considered similar to the cancellation of an Australian passport, Professor Maley said.

"But the cancellation of a passport does not constitute the elimination of citizenship."

The seat of Canberra, which has reduced in size following redistribution and the addition of a third lower house seat in the ACT, is considered a safe Labor seat, which is held on a 12.8 per cent margin.