The South African High Commission is located at Menara HLX, formerly Menara HLA, in Jalan Kia Peng, Kuala Lumpur. Since apostilles are not issued by the Malaysian authorities, since Malaysia is not a signatory to the Apostille Treaty, documents are legalised by the relevant diplomatic mission after they have been notarised by a Malaysia notary public and authenticated by the Malaysian foreign ministry.
There is no online appointment system for the South African High Commission, so just drop by during office hours. A phone call beforehand is of course advisable. A pleasant surprise is that unlike most embassies, there are no charges for legalisation! In my case, the documents were ready for collection two working days later.
During the current pandemic, it takes longer than usual to courier documents to South Africa. Delivery by DHL cost RM300 and it took a week to arrive.
Malaysian Notary Public 
Afternoon Leslie,
Alex Yeo, a Notary Public from Kuching, Sarawak.
Have recently attended to an expat in Kuching pertaining to his loan documentation from South Africa (SA) which require a one page Apostille Certificate, according to the attending Legal Firm in SA
Have come across your write up and appreciate your feedbacks. Pertaining to SA scenario, you mentioned that since Msia is NOT a member convention and will not issue any apostille certificate BUT you went on to mention after notarised by a Public Notary and followed by authentication from Ministry of Foreign Affairs (MOFA Wisma Putra) which puzzled me.
Can you explained in details the authentication process or is it a stamp chop by MOFA Wisma Putra on the reverse page of the relevant documents as MOFA Sarawak Branch mentioned they will NOT issue any apostille certificate as Msia is not a member convention
I can be reach at 012-8089196
Regards and take care
Hi Alex, it was good to speak to a fellow notary from Sarawak. As discussed, I suggest you do not refer to an apostile when dealing with the Foreign Ministry. Just get them to authenticate the notarisation, which I presume can be done in Kuching, Then you need to have the document legalised by the South African High Commission.