Brendan Horan's position with the New Zealand First party is set to go before the organisation's hierarchy.
Allegations against Mr Horan, and his recent expulsion from the party's caucus, will be discussed by the New Zealand First board when it meets tonight.
Tonight's meeting is a scheduled one, not one specifically organised to discuss Mr Horan's status.
The party says it will be the first chance for the board to see the case Winston Peters has against his former colleague.
It is unlikely the meeting will result in Mr Horan's expulsion from the party, but it is expected to canvas how that process may proceed.