Sick / Fit Note
Fit notes are issued to patients by doctors following an assessment of their fitness for work. A fit note is issued after the first seven days of sickness absence (when patients can self-certify) if the doctor assesses that the patient’s health and condition will affect their fitness for work a fit note may be issued so the patient and employer can consider ways to help them return to work.
The doctor can decide the patient is 'unfit for work' or 'may be fit for work subject to the following advice...' with accompanying notes on suggested adjustments, phased return or adaptations to the job role or workplace.
A fit note is not needed if you are fit and well enough to return to work as normal.