Police will audit about 200,000 traffic infringements amid concerns bad drivers may be rorting the demerit point system to avoid losing their licences.

The review was ordered this month after a man was allegedly caught paying strangers to take his demerit points.

He was accused of advertising on the Gumtree website for people to pretend to have been driving when he was twice caught speeding between 9km/h and 19km/h over the limit.

The man offered to pay $100 cash and said he would cover the $150 speeding fines but wanted to avoid two demerit points for each offence, police alleged.

Assistant Commissioner Nick Anticich said police had charged the alleged driver with two counts of wilfully misleading authorities, a charge that carries a potential fine of $1600. They have reissued the infringements.

Mr Anticich has ordered an audit of infringements in the past 12 months where people had nominated another driver, to identify whether other motorists have been trying to avoid penalties.

People who lose 12 demerit points are banned from driving for three months. Points can accrue over three years.

Mr Anticich said police had no doubt some people had accepted blame for a friend or relative's driving infractions but the use of social media to engage strangers was taking it to a new level.

Drivers who had committed enough offences to lose their licences were dangerous and should not be on the road.

He said the demerit point scheme gave drivers "more than enough chances" to correct their driving behaviour.

Road Safety Council chairman Murray Lampard condemned the practice of selling demerit points.

"These actions are an attack on the integrity of the strong road safety message we strive for," he said.

Former Federal Court judge Marcus Einfeld was jailed in 2009 after he lied about who had been driving his car when it was snapped speeding.

The woman he claimed was behind the wheel had died in a car crash three years earlier.

WA Police last year charged a teacher with attempting to pervert the course of justice after she lied about who was driving when she was caught speeding.

She pleaded guilty but successfully appealed against her conviction, arguing what she had admitted to was not legally that offence.

Mr Anticich said police were investigating what criminal charges could be laid over this type of offence.