The Greek embassy has confirmed federal government backbencher Julia Banks is not a citizen of Greece, avoiding a potential crisis for the Turnbull government.
The Liberal Party examined Ms Banks' status on Friday after speculation she may have been a dual a citizen because of her parents' Greek heritage.
"We have received confirmation from the Greek Embassy that according to records, Julia Banks is not registered as a Greek citizen and also is not entitled as a Greek citizen," a party spokesman said in a statement late on Friday.
Her late father Phil Lolatgis migrated from Piraeus, Greece, in 1949 as a 15-year-old, while her mother Helen was born in Australia.
"I have never taken up Greek citizenship," Ms Banks said in a text message to media outlets on Friday.
Questions had been raised about her citizenship status after LNP senator Matt Canavan resigned from cabinet upon discovering his mother had registered him as an Italian citizen without his consent. The issue will be tested in the High Court once the Senate refers the matter on August 8.
Greens senators Larissa Waters and Scott Ludlam both quit parliament after also finding out they held dual citizenship.
The government is considering asking the Senate to refer One Nation senator Malcolm Roberts to the court over questions about his UK links.
Australian Prime Minister Malcolm Turnbull being meet at a tram stop by Julia Banks in this file image. Source: AAP
"Obviously if we have a suspicion (about Senator Roberts), we'll check it up," Deputy Prime Minister Barnaby Joyce told reporters on Friday.
Senator Roberts was born in India in 1955 to a Welsh father and Australian mother and came to Australia in 1974.
On Thursday he told Sky News that when he filling out his candidate nomination form last year, he thought it best to double-check.
Senator Roberts wrote to UK authorities saying if they had him on the books he wanted to renounce his UK citizenship before election nominations closed.
They didn't confirm his correspondence until five months after he was elected.
If found ineligible, his Queensland seat would pass to the third person on the One Nation 2016 ticket, Fraser Anning.
However, Mr Anning is the subject of bankruptcy proceedings due to go to the Federal Court on August 22. Bankrupts are disqualified from being elected.
The fourth person on the ticket is One Nation Leader Pauline Hanson's sister, Judy Smith.
