Taxi drivers in Middlesbrough are voicing their concern over the number of unlicensed mini-cabs operating in the town. They said that about 50 people have put stickers on their cars in an attempt to pass themselves off as licensed taxis.
And they warn that people could be at risk from uninsured drivers or those who have not had criminal checks.
However, the council said it is aware of the problem, and has prosecuted more than 100 unlicensed drivers.
A council spokesman said: "We are currently doing enforcement activities with the police, on the basis of one weekend every month.
"In the past 12 months we have brought about 109 prosecutions which have led to disqualification from driving and resulted in fines of around �17,000."