A medical certificate of fitness is a signed statement from an occupational health practitioner that an employee is medically fit — or fit with stated restrictions — for a specific job and the hazards that job exposes them to. It certifies fitness for the work, not general health, and it is the document an inspector or a principal contractor asks to see.
An occupational health practitioner. The regulations under the OHS Act define that as an occupational medicine practitioner, or a person who holds a qualification in occupational health recognised by the South African Nursing Council or the Health Professions Council. In practice it is signed by an occupational health nurse practitioner or an occupational medicine doctor.
A general practitioner's letter saying someone is "fit to work" is not the same document. It speaks to whether a person is well, not to whether they can safely do a particular job with its particular exposures — and it is not what a construction safety file or an inspector will accept.
Anyone whose work exposes them to a hazard that a regulation attaches medical surveillance to, and anyone whose job carries an inherent medical requirement. The usual triggers are:
Which of your employees fall into which group is a question about their jobs, not their titles. The guide to whether workplace medicals are compulsory goes through the regulations one by one.
The job sets the content — a forklift operator and a receptionist do not get the same medical. A typical occupational medical covers:
No single period covers every certificate — the interval follows the hazard. Construction certificates on the Annexure 3 form are renewed every twelve months in practice, which is the interval principal contractors and safety files work to. The Noise Exposure Regulations repeat audiometry every twelve months (every six at 105 dB(A) and above), and the Hazardous Chemical Agents Regulations require periodic evaluation at least every two years. Most surveillance programmes therefore run annually.
A certificate should be redone sooner if the job changes, the exposure changes, or the employee's health changes in a way that matters for the work — after a serious illness or injury, for instance. That is why a register of expiry dates is worth more than a stack of certificates.
The outcome, not the medical file. The certificate states one of four things — fit, fit with restrictions, temporarily unfit, or unfit — for that job, with any restriction the employer needs to act on.
The clinical detail behind it stays with the practitioner. Health information is special personal information under POPIA, and an employer is not entitled to an employee's diagnosis because it paid for the medical. If more needs to be shared, the employee consents to it first.
Only where it has a basis. The Employment Equity Act prohibits medical testing of an employee unless legislation requires or permits it, or it is justifiable — for example by the inherent requirements of the job — and for that purpose a job applicant counts as an employee. HIV testing is prohibited outright unless the Labour Court has declared it justifiable.
So a lawful pre-employment medical tests for the demands and exposures of the role being filled. It is not a general health screen, and it should not be used as one.
The certificate records the finding and the reasoning — usually a restriction rather than a flat "unfit", and often temporary: high blood pressure that needs controlling before work at height, for example. What follows is an employer decision — accommodation, adjusted duties, redeployment — but it is now a decision made on a documented clinical basis rather than a guess.
Not as a rule. It certifies fitness for a specific job and its exposures, so a new job — or the same job with different hazards — needs its own assessment. A previous certificate is still useful history.
The employer. Section 23 of the OHS Act prohibits deducting from an employee’s pay the cost of anything the employer must do or provide under the Act in the interest of their health and safety.
Yes, if the nurse is an occupational health practitioner — that is, holds a qualification in occupational health recognised by the South African Nursing Council. That is exactly what the OHS Act definition provides for.