Former federal police chief Mick Keelty will travel to Perth as part of his investigation into ballot papers that were found to be missing during the recount of Senate votes in Western Australia.
Mr Keelty has been asked to provide an interim report by the end of this month, the Australian Electoral Commission (AEC) said on Wednesday.
His inquiry will identify any administrative process or procedural failures that may have occurred, as well as providing findings and recommendations to the AEC.
The 1255 above-the-line ballots and 120 informal votes disappeared during a recount by the AEC after the September 7 federal election.
Mr Keelty has been allocated five Canberra-based AEC staff to assist his independent inquiry.
An AEC spokesman said the commission was still considering its position in relation to a possible petition to the Court of Disputed Returns.
Labor, the Greens and the WikiLeaks party are also considering taking the matter to court.