There are many traffic offences for which a police officer can issue an expiation notice (or on-the-spot fine) rather than a summons to attend court proceedings for prosecution.
An on-the-spot fine is not recorded as a conviction, but a driver will incur demerit points for the offence [see Motor Vehicles Act 1959 (SA) s 98B] and upon expiation, the same rules of forfeiture will apply as if a conviction had been recorded [see Expiation of Offences Act 1996 (SA) s 15(5)].
For more information about the expiation notice system and the options available upon receiving an expiation notice, see Expiation Fees and Fines.