Occasionally patients ask if a doctor can issue a medical certificate (MC) to cover days before they managed to see a doctor. The short answer is no. Medical certificates are legal documents that must reflect the actual assessment date and clinical findings.
SMC guidance on MC issuance
The Singapore Medical Council (SMC) Ethical Code and Guidelines is explicit: MCs cannot be post-dated or back-dated. Doctors are responsible for ensuring the patient deserves the certificate on proper medical grounds and that those grounds were established through a good clinical assessment. Each MC must start from the day of consultation or procedure, except when the clinical presentation makes it clear the patient was already unwell beforehand.
Why back-dating is rarely permitted
Back-dating undermines professional integrity. Doctors must protect the trust placed in them by patients, employers, and public institutions. Issuing an MC for a period that was not assessed can constitute fraud and may trigger disciplinary action.
- Legal implications: Inaccurate records expose both doctor and patient to liability.
- Insurance and HR decisions: Companies and insurers rely on MCs to grant sick leave or benefits; discrepancies can void claims.
- Patient safety: Accurate timelines ensure appropriate follow-up care and escalation when symptoms worsen.
When doctors may consider earlier cover
There are limited situations where a doctor can reasonably infer you were already unfit for duty before the consultation. Even then, the issuance date cannot be changed and the doctor must document why earlier cover is justified.
- Clinical findings clearly show you have been ill for several days (for example, dehydration from persistent gastroenteritis).
- Objective evidence such as blood tests, imaging, or hospital records that are dated before the teleconsult.
- A prior visit to another healthcare provider that confirms the same illness trajectory.
Expect the duration granted to remain conservative—usually 1–3 days for teleconsults. Doctors often schedule a review if symptoms persist or recommend visiting a clinic for a physical examination.
What to do if you missed the window
If you were too ill to consult earlier, be transparent with your employer. Many HR teams will accept a note explaining the circumstances or may allow you to tap annual leave. For persistent or recurring symptoms, plan a follow-up with your regular GP or specialist so they can document ongoing care.
Frequently asked questions
Can a doctor change another doctor’s MC?
No. A doctor must reassess the patient personally and consult the original issuer before amending any MC details.
Will telemedicine doctors extend my MC?
Possibly. Extensions require a reassessment; some providers charge an admin fee if a full video consult is not needed.
What if I need a Medical Certificate to cover a the days before my consult?
Discuss alternatives with your employer. Some companies accept a self-declaration or annual leave for the earlier absence.
