A garage owner has been found guilty of three counts of conspiracy to defraud, after he used four garages in Leeds to issue thousands of invalid MoT certificates for vehicles that were not properly tested.
Roobik Mirzabegi, 51, is thought to have made vast sums of money from the operation, which was discovered after an investigation from Vehicle Operator Services Agency (VOSA) and West Yorkshire Police. He is waiting to be sentenced.
His brother, Hakop Mirzabaigian, was also found guilty of forgery and was fined £6,500.
Ten other men received sentences in January for their involvement in the case.
Alex Fiddes, VOSA chief operating officer said: "I am delighted with the result of this joint investigation between VOSA and West Yorkshire Police.
"It sends out a clear message that we will not tolerate abuse of the MoT scheme.
“Fortunately, this is a rare case and VOSA is committed to working with legitimate businesses to ensure road safety."