If you’re off work sick for 7 days or less, your employer should not ask for medical evidence that you’ve been ill. Instead, they can ask you to confirm that you’ve been ill. You can do this by filling in a form yourself when you return to work. We call this self-certification.
Find out more about sick notes on the NHS Inform.
MED3 forms (sick notes) are only provided for absences longer than 7 days. A clinical letter may be provided to state your unfitness for work if appropriate, for a fee.