Unlicensed taxi drivers are being told they will not be tolerated as the district council conducts a crack down during the Silverstone Moto GP later this month.
As thousands of motorsport fans descend on the area for the race weekend starting Friday, August 30, South Northants Council (SNC) will carry out a test purchase operation.
The council is also reminding passengers that unlicensed private hire vehicles may not be insured and their vehicles may have missed out on safety checks.
Cllr Dermot Bambridge, portfolio holder for environmental sciences, said those breaking the rules will be prosecuted.
He added: “The action we are taking sends out a clear message that we will take action against illegal activities that may put the public at risk.”