The Health Practitioners Disciplinary Tribunal has found a doctor guilty of professional misconduct for forging another doctor's signature on a medical certificate.
The doctor, who was trying to obtain a heavy vehicle licence, submitted the falsified document to the Automobile Association last August.
When his colleague found out she alerted the Land Transport Authority and laid a complaint with the medical council.
The tribunal's decision says it was a one-off act of gross stupidity at a time of great stress.
The tribunal has ordered the doctor, who has permanent name suppression, to pay a fine of $5,000, and 25% of the hearing costs.
