Brittany Higgins has abandoned her appeal of a WA Supreme Court finding that she defamed her former boss and Liberal Senator Linda Reynolds in a series of social media posts.

In August, Justice Paul Tottle had ordered Ms Higgins pay $315,000 in damages and more than $26,000 in interest after she and her husband, David Sharaz, were found to have defamed the former senator in the social media posts.

His ruling followed a trial in Perth last year in which Ms Reynolds accused her former staffer of conducting an orchestrated campaign to end her political career.

Last month, Justice Tottle also ordered that Ms Higgins pay 80 per cent of Ms Reynolds' legal costs.

Ms Reynolds' lawyer told the ABC the cost order would exceed $1 million.

In September, Ms Higgins filed a last-minute appeal of t

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