If you’re off work for 7 days or less, your employer shouldn’t ask you to provide medical evidence that you were unwell or injured. However, they can ask you to provide proof and you should be prepared to show your employer a self-certification form when you return to work.
Many employers have their own self-certification form, but HM Revenue and Customs have created, and made publicly available, their own form template if your employer doesn’t have one. You can obtain this form from your employer or by visiting the HMRC website.
Sick Note [Fit note]
Employees only need a fit note [Sick line or Sick note] from a doctor , if you are off for more than 7 days in a row. If you are unwell for more than Seven days in a row, you are advised to arrange an appointment to see a Doctor to assess your fitness to work.
The Doctor will provide you with a Statement of Fitness for Work (‘Fit Note or Sick note or Sick line’) if you are still not well enough to work. Your employer will most likely request this statement as evidence to support payment of Statutory Sick Pay (SSP).
Further information is available at the Direct.Gov website.
If you or your employer require further information concerning your period(s) of illness , then your Doctor may require to issue you with a letter. Please note that a charge will apply for this service.