Jacqui Lambie is resigning from the Senate because she's a dual national

Jacqui Lambie could quit within 24 hours

Members of the Federal Parliament will need to publicly disclose family history and any steps taken to renounce dual citizenships under a motion expected to go to the Senate on Monday.

Lambie, who first entered the senate in 2013 as a member of Clive Palmer's Palmer United Party, left, and was re-elected as an independent senator past year.

The ABC asked whether Senator Lambie or her father had renounced any rights to British citizenship, which were not addressed.

Jacqui Lambie, an independent senator for the island state of Tasmania, confirmed that she is a dual United Kingdom citizen and that she will officially resign from parliament later on Tuesday.

Lambie has confirmed she inherited British citizenship from her Scottish-born father and it was "quite clear" she was ineligible to remain in parliament, she said in a radio interview.

Lambie, 43, a former army corporal, has become one of Australia's most recognizable and colorful politicians in her short time in office.

"She's expecting the worst and she's expecting to leave Canberra by Tuesday afternoon", one source said.

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But it is true that she is now awaiting "urgent" advice from British authorities as to whether she holds dual citizenship.

"I'm happy to put on the record that I'm satisfied that my parents are both Australian citizens and I have no concerns about me being a dual citizen because of where they were born or came from", she said.

"If I am a dual citizen I will resign".

Lambie addressed the growing concern in a meeting on Monday, saying her home state of Tasmania would be "the first to know" should she resign.

The dual citizenship saga, which kicked off in July when two Greens Senators resigned after discovering they held dual citizenship, has plagued the parliament for months now and continues to threaten Prime Minister Malcolm Turnbull's delicate majority.

Both sides of politics have accused the other side of having MPs with questionable citizenship status and threatened to refer them to the High Court. To try end the citizenship crisis, all MPs will be forced to disclose their heritage by December 1st which could trigger several by-elections and completely upend parliament.