Referee Steven Craven's appeal against a lifetime ban has been rejected by the Scottish Football Association.
The former top-flight asisstant referee resigned following his involvement in a match at Tannadice last season.
Referee Dougie McDonald overturned a penalty awarded to Celtic against Dundee United and Craven resigned over his part in the incident.
He was barred from officiating matches by the Glasgow Referee's Association, a decision that was upheld at Hampden.
Following the hearing, Craven's lawyer insisted that the ban was disproportionate and that his client will now explore his options.