Pauline Hanson has pleaded with a man who led her to believe her NSW election result was sabotaged to show up in court, while a judge issued a warrant for him to appear.

The former One Nation leader, who ran as an independent in the March 26 election, believes she was cheated out of 1200 votes that were put in a pile of blank ballots by "dodgy staff" at the NSW Electoral Commission.

Her claim that this cost her a place in the NSW upper house is based on alleged email exchanges between the commission's chief information officer Ian Brightwell and its communications manager Richard Carroll.

But the existence of the alleged emails, and the man who alerted her to the them, Michael Rattner, is in dispute after he failed to show up to give evidence in the Supreme Court on Wednesday.

"I've either been cheated out of a seat or this is a very elaborate hoax," Ms Hanson said before the hearing commenced.