A driving test examiner, Mr Richard Cwierzona, took bribes to pass pupils who took their driving tests at his north London test centre.
Mr Cwierzona, 49, pleaded guilty to two charges of bribery at Wood Green Crown Court of accepting bribes ranging from £80 to £1,000.
Richard Cwierzona, who was born in Poland and came to England in 1990, was sentenced to two and a half years in prison.
He became an examiner and was employed by the Driving Standards Agency (DSA) in 2002 and worked in the Barnet test centre.
The head of fraud at the DSA, Andy Rice, said that a total of 39 driving licences had to be revoked as a result of the investigations. However he was quick to point out that the public should still have faith in the driving test system as these offences were very rare indeed. These offences can put people on our roads who do not meet our high standards and as a result we take any breach of our rules very seriously indeed.