Six separate reports of number plate thefts from the Fleurieu and Hills districts this month has prompted a community warning from police.
Vehicle and trailer number plates have been reported stolen from Port Elliot, Goolwa Beach, Clayton Bay, Birdwood, Meadows and Crafers since November 1.
Hills Fleurieu police said theft of number plates can further additional crimes like petrol theft.
"This crime, which can cause great inconvenience to the victim, can be easily prevented through the use of tamper proof screws," police said in a statement.
Tamper-resistant screws are available for free, along with a referral to a repairer to fit them free of charge, for members of the RAA . For more information, visit www.raa.com.au/motor/safety-and-advice/car-advice
The Neighbourhood Watch Shop also offers Plate Safe security screws at www.neighbourhoodwatchshop.com.au
Anyone who sees someone acting in a suspicious manner around parked vehicles should call police immediately on 131 444. Prompt reporting can assist police in locating offenders and prevent further crimes.