Patients can self certify for 7 days or less. Your employer should not ask for medical evidence that you have been ill. Instead they can confirm that you’ve been and you can do this by filling in a form yourself when you return to work. This is called self certification
Please click on the following link to go to the NHS website for further information: https://www.nhs.uk/common-health-questions/caring-carers-and-long-term-conditions/when-do-i-need-a-fit-note/
