If a patient is off work for seven days or less the GP does not have to provide a sick note. A patient can be refused a note or charged for a private one for illnesses of seven days or less.
For illnesses of seven days or less you can self certify using this form from DWP, although many employers will have their own form. You can also collect this form from our front desk.
If you need certification for periods longer than 7 days please discuss with a GP.
For further information please visit the gov.uk website here