Independent MP Nicolette Boele has been locked in as the member for Australia's most marginal seat after her Liberal opponent conceded defeat.

Liberal Gisele Kapterian said she had abandoned a last ditch legal challenge to the result some four months after the May federal election.

Ms Kapterian on Thursday said she was satisfied the result was correct after a final review of the ballot papers.

Ms Boele won the Sydney-based seat of Bradfield, a former Liberal stronghold, by just 26 votes.

"Serving this community is the privilege of my lifetime, and I do not take this responsibility lightly. I will continue to serve with integrity, care, and dedication," Ms Boele said in a statement following the concession.

"Being part of this process has given me an even greater appreciation for the s

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