Police forces have combined their resources to target those using illegal number plates.
Essex, Suffolk, Norfolk, Cambridgeshire, Hertfordshire and Bedfordshire Police are working together on Operation Dragon for three weeks until August 5.
Illegal number plates are often used on cars and vans involved in crime because they are difficult for officers to read and identify.
So traffic teams are working together to spot the culprits.
Last time about 300 drivers were given fines of up to £1,000 for the offence