When the party was revived under its original name in 2018, it was represented by ex-One Nation senator Brian Burston in the federal parliament.

On 23 August 2021, independent MP Craig Kelly joined the party, becoming its first representative in the lower house since Palmer's retirement in 2016.

In April 2013, Palmer announced he was relaunching the UAP with the goal of running candidates in the 2013 federal election and had applied for registration in Queensland.

[23] In the state of Victoria, two retired sportsmen were announced as Senate candidates: Australian rules football player Doug Hawkins and boxer Barry Michael.

In October 2013, Australian Motoring Enthusiast Party senator-elect Ricky Muir, of Victoria, agreed to enter into an informal alliance with the PUP.

left the alliance,[27] followed by Lambie who resigned to sit as an independent in November 2014,[28] and similarly, Lazarus in March 2015.

[30] On 11 August 2014, Queensland Palmer United Party MP Alex Douglas resigned from the party to become an independent citing cronyism: "When I resigned from the LNP in November, 2012, I publicly stated there was a culture in the LNP, and there still is, of looking after mates and relatives, and that I do not support these flawed ideas.

[32] On 8 October 2014, Queensland's only remaining PUP MP Carl Judge resigned from the party to become an independent.

[34] Lambie's resignation followed several weeks of disagreements with party leader Clive Palmer, culminating in her voting with a group of senators calling themselves the "coalition of common sense" in passing a disallowance motion on legislation supported by PUP to repeal the Future of Financial Advice reforms introduced by the previous Labor government.

[35] On 29 November 2014, Northern Territory MPs Alison Anderson and Larisa Lee announced they were resigning from the PUP to sit as independents.

Anderson stated that she and Lee could no longer tolerate the "absolute chaos" in a party that had become a "national disgrace".

Lee said that the PUP had "just kind of left (us) in the dark" after promising that she, Anderson and Kurrupuwu would be in a position to carry the party's banner and help them fight for Aboriginal rights.

[36] On 13 March 2015, Queensland Senator Glenn Lazarus announced his resignation from the PUP, accusing Clive Palmer of bullying, swearing and yelling at people.

His wife Tess Sanders-Lazarus joined in, saying "I did make it clear to Clive that I was not happy with being bullied and spoken to using foul language."

[37][38] PUP national director Peter Burke, responded by saying: "There is no doubting the timing of Senator Lazarus's defection from the party which came after Tess' sacking as a result of her not doing her job."

Mr Burke said Tess Lazarus was dismissed for spending her time writing speeches and questions for her husband instead of working on agreed party duties.

[52] In May, the claim made in her campaign material by Queensland UAP Senate candidate Yodie Batzke that she was an "adjunct lecturer" at the Cairns campus of James Cook University was denied by that organisation.

[60] On 23 August 2021, Independent MP Craig Kelly having been elected as the Liberal representative for the seat of Hughes, joined the party.

[61] In September 2021, the Sydney Morning Herald reported on objections to the application to change the name to the United Australia Party that had been made to the AEC.

[62] Several of the UAP's Senate candidates for the 2022 Australian federal election have espoused anti-vaccine beliefs, or are business associates of Palmer himself.

The United Australia Party (UAP) was registered with the Electoral Commission of Queensland (ECQ) on 5 June 2013.

[88] PUP had a poor run-up to the election; although actively stopping a number of federal education and health reforms in the Senate, Lambie's decision to leave the party following the departure of Carl Judge and Alex Douglas at the state level, gave an impression that the party was in disarray.

PUP policies included: a First Farm Buyers Grant; to abolish payroll tax for businesses and; tighter regulation of coal seam gas operations.

[90] While counting was underway, the PUP candidate for Ferny Grove, Mark Taverner, was revealed to be an undischarged bankrupt.

[93] Ngoc Chau Huynh and Kristian Rees (a former soccer player who finished his career at the then Clive Palmer-owned Gold Coast United) ran on a combined ticket for the Legislative Council, and polled 1.6 percent without either being elected.

It achieved its best result in the Division of Braddon, where its candidates polled 7.18 percent to finish ahead of the Tasmanian Greens, and third overall, behind the Liberals and Labor.

[100][101] Palmer United and the Liberals were subject to TEC investigations over claims they had breached electoral advertising rules by publishing the name and photos of opposing candidates without their permission.

In January 2015, unsuccessful Palmer United Party candidate Maria Rigoni petitioned the Supreme Court of Victoria to declare the 2014 election invalid, alleging that the Victorian Electoral Commission had breached the Electoral Act whilst conducting the election.

Palmer, in the midst of a court case against Western Australian Premier Mark McGowan, announced his party would not contest the 2021 state election.