FAILED NSW upper house candidate Pauline Hanson has accused the NSW Electoral Commission of ignoring allegations that ''dodgy staff'' put 1200 votes for her in a pile of blank ballots.

Ms Hanson yesterday challenged the election count for the NSW upper house, saying the alleged sabotage had cost her a place in the new Parliament.

She says a source within the commission had told her of 1200 votes lost in the blank pile after forwarding her an internal email discussing alleged sabotage by its staff.

The email, which, according to Ms Hanson's petition lodged in the NSW Supreme Court sitting as the Court of Disputed Returns, was attributed to an Electoral Commission officer.

Ms Hanson's lawyer, David Leamey, said the former One Nation leader would have won a seat if the votes had been counted. She missed out on an upper house place by 1306 votes.