Sickness Certificates
You do not require a doctor's sickness certificate for any illness lasting seven days or less. Your employer may however require you to complete a self-certification form (SC2) which is available from your employer or on the HMRC website. We will not provide a sick note for any illness lasting less than 7 days.
Evidence that you are sick
If you are sick for more than seven days, your employer can ask you to give them some form of medical evidence to support payment of SSP (statutory sick pay).
It is up to your employer to decide whether you are incapable of work. A medical certificate, now called a 'Statement of Fitness for Work’ from your doctor is strong evidence that you are sick and would normally be accepted, unless there is evidence to prove otherwise.
If you have seen your dentist or you have recently been an inpatient in hospital and they have recommended that you are not fit for work they will need to provide you with a sick note in the first instance.
How do I obtain a sick note? For the first sick note regarding your medical condition you will be required to have a consultation. For sick note extensions you can complete a request via eConsult.
Statement of Fitness for Work - ’Fit Note'
The 'fit note' was introduced on 6 April 2010. With your employer's support, the note will help you return to work sooner by providing more information about the effects of your illness or injury. You do not require a note from the GP to state you are fit to return to work.
For more information see the DirectGov website (this link will open in a new window - popups must be allowed) (where this information was sourced)