If you are absent from work due to illness for less than seven working days you need to obtain a form SC2 from your employer.
If, after seven days, you are still unwell you will need to request a sick note via or online service. Click on the online consult box on the home page and request a sick note which will then be sent to you if confirmed. Any problems a GP will contact you.
If your employer asks for a certificate for an illness lasting less than seven days, a private certificate can be issued but a fee is payable for this. Form SC1, required by the self-employed, can be obtained from the surgery.