The Independent Electoral Commission in the Western Cape says voter registration is slow in two wards in the province.
Voting stations in ward three in Saldanha Bay and ward 13 in Oudtshoorn opened at eight on Saturday morning.
Voters in these two wards can either register or check their registration details in preparation for by-elections scheduled for next month.
Provincial Electoral Officer Courtney Sampson says the slow pace of registrations is due to the fact that many people are already registered.
He says voters must take their identity documents with them, either a green barcoded ID book, a smartcard ID, or a valid Temporary ID Certificate.