UPCI drop minister without notice?

[houston]

Other than when a minister does not pay his dues, under what circumstances will the UPCI remove a minister from the organization without so much as a notice or a telephone call?

Background to the question:
I was told that a pastor notified his congregation that the UPCI has removed him from the organization. The pastor stated that he stopped receiving UPCI material in the mail.

I told the person relaying the info that the organization will drop a minister if he doesn't pay his dues and that I am not aware of any other circumstances where they will remove a minister without requesting that he meet with his district board.
Background to the pastor: he was reclusive as far as the district and section are concerned. The church didn't fellowship with any of the churches nearby. Could this be why he was dropped by the org?