Not on the version you send out. A South African ID number reveals your date of birth and other details, and in the wrong hands it's useful for identity fraud. Under POPIA, "personal information" explicitly includes "any identifying number" as well as race, gender, marital status and age (POPIA section 1), and organisations must have a lawful reason to process it.
In practice:
- Leave the ID number off your CV when posting it on job sites or emailing it to recruiters.
- Give it when there's a clear purpose, such as an employer's application form, a criminal record or qualification check, or a job offer.
- Public-service jobs ask for personal details on the government's Z83 application form, submitted with your CV. The Department of Employment and Labour's vacancies page states this for its own posts. Read each advert's instructions and supply exactly what it lists, including any certified copies it asks for at a later stage.
The same logic applies to your date of birth and full home address. A suburb and city tell a recruiter whether you can commute; nothing more is needed at the shortlisting stage.