Joan Aitken, Scotland's Traffic Commissioner, refused an HGV licence for Renfrew haulier John Baird.
The haulier's application twas refused by Miss Aitken, after she found he had been operating illegally.
John Baird, trading as Scotia Trucking Services, was also told he would be disqualified indefinitely from being a transport manager.
In a written decision issued after a public inquiry, which concluded on August 28, the regulator criticised Mr Baird after he was caught operating unlawfully by the Vehicle and Operator Services Agency (VOSA).
The incident took place a month after Mr Baird had first appeared before the Traffic Commissioner in June, when his application remained under consideration.
Those actions, she added, constituted an abuse of fair competition.
Mr Baird, who had been disqualified as a director in the past and also appeared at public inquiry in connection with previous operator licences, originally tried to take over his father's licence
However, this was refused when Miss Aitken ruled the application had not been made within a reasonable period.
Mr Baird's father passed away in May 2012, but this was only brought to the attention of the Commissioner in October 2012.
During the inquiry, the Traffic Commissioner heard a vehicle carrying wine was stopped by VOSA examiners in July 2013.
It was not displaying an operator's licence disc and did not have a valid MOT. The trailer was also found not to have a valid MOT.
The driver told officers he was working for Ian Baird, a name John Baird is also known by.
Mr Baird told the regulator he used the vehicle because he was losing work to other hauliers and admitted he had taken a chance.
The regulator concluded: "He left a public inquiry where his repute was at stake and a month later VOSA caught him in the act of unlawful operating - his motivation being to keep the work from other hauliers.
"He is not a person in whom I can repose trust."