Federal MP Clive Palmer will be able to relax when he gives his maiden speech to Parliament on Monday - safe in the knowledge that the Liberal National Party will not challenge the Fairfax result in the High Court.

For the past four weeks, the LNP has been considering whether it would petition the High Court over the close result in the Sunshine Coast seat of Fairfax.

The Palmer United Party leader beat LNP candidate Ted O'Brien by just 53 votes after a recount, with the result officially declared on November 1.