The Turnbull government has sidestepped a potential threat to its slim parliamentary majority after it was confirmed backbencher Julia Banks is not a citizen of Greece.
The Liberal Party on Friday said it received confirmation from the Greek embassy that Ms Banks does not hold Greek citizenship.
There had been speculation about her eligibility for parliament due to her parents' Greek heritage.
If she was forced to step down a by-election in her marginal Melbourne seat of Chisholm could have threatened the government's one-seat majority.
LNP senator Matt Canavan resigned from cabinet last week upon discovering his mother had registered him as an Italian citizen without his consent. The issue will be tested in the High Court.
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.