Australia

MPs' citizenship documents released

All 226 MPs have now publicly released details of their citizenship and family history.

Four Labor MPs could face High Court referral after they lodged documents which could raise questions about their eligibility.

The citizenship and family history details of 150 lower house MPs were tabled in parliament on Tuesday afternoon, a day after the details of their 76 Senate colleagues were released.

Tasmanian Labor MP Justine Keay, whose father was born in the UK, completed a declaration of renunciation on May 9, a month before the close of nominations for the 2016 election.

Australia Post confirmed the form was delivered to the UK Home Office on May 23.

However, the Home Office did not write back to her confirming the renunciation until July 8, six days after election day, and the declaration of renunciation was registered on July 11.

The Home Office letter was stamped both "received 31 May" and "received 16 June".

She also tabled legal advice which said she had satisfied all the legal requirements for renouncing British citizenship when she mailed her completed form.

Longman MP Susan Lamb, whose father was born in Scotland, filled out her renunciation form on May 24 and the Home Office processed payment on June 6, three days before the close of nominations.

However, the Home Office sought further information on July 7, which she provided, and on August 10 the British bureaucracy told her: "We cannot be satisfied from the documents available that you hold British citizenship. The application has therefore been refused."

Ms Lamb also released legal advice which stated she had taken all necessary steps to renounce her citizenship when she sent her form on May 25.

Fremantle MP Josh Wilson, who was born in London, completed his renunciation form on May 12 and confirmation of its delivery was given on May 16, with the payment processed on June 6.

However, the date of the UK Home Office letter confirming renunciation was June 24, well after the close of nominations for the 2016 election.

Batman MP David Feeney, whose father was born in Ireland, said he had signed documents in October 2007.

"As far as I am aware, those documents were sent to the relevant British and Irish authorities as required at the time," he wrote.