Your employer 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. This is called self-certification.

Self-certification forms usually include details such as:

• information about your sickness or illness
• the date your sickness started
• the date your sickness ended

These dates may be days that you don't normally work. For example, your sickness could start or end on a Saturday, Sunday or bank holiday.

Many employers have their own self-certification forms. If your employer doesn't have their own form, instead they may use an SC2 form from HM Revenue & Customs Employee's Statement of Sickness.

Download a template self certification form

If you are sick and off work for more than seven days, your employer will normally ask you to provide a medical certificate from your GP.

When you need a certificate will also depend on your employer's company policy on sick leave (or sickness absence). This policy should tell you how many days you can be off sick before you need a note.

To find out about your employer's policy:

• ask your team leader or supervisor, or
• speak to someone from your human resources (HR) or personnel department

A medical certificate note must be signed by a doctor. The Fit Notes mean your GP can give you advice to help you return to work. This is because work can play an important part in helping people to recover from illness on injury. The GP can either say you are not fit for work, or can say you may be fit for work. The GP will choose the option for may be fit to work if they think that returning to work – with support from your employer – will help you.

There is also space for the GP to give advice to your employer about the impact of your illness or injury and can suggest common ways in which your employer can help you return to work such as allowing you to work part time or temporarily or by changing your duties, for example, if you have back pain, avoiding heavy lifting.

Fit notes are also sometimes called doctor's notes, sick notes, medical certificates or doctor's statements.

If you have seen a doctor at the practice regarding the problem you need a medical certificate for (or we have received a letter from the hospital about your sickness) you many not need to see the doctor again. The doctor may be able to speak to you on the telephone depending on how well they know you and why you are off work sick.

If you have not seen a doctor at the practice and we have had no information from a medical professional about your illness, you will not be able to get a certificate without an appointment. Please book a routine appointment; urgent appointments are only provided for genuine medical emergencies and not for the purpose of certificates.

In either case there are rules governing the issue of sick certificates and the GP may not be able to supply one, depending on the information you provide.

If you are under the care of a hospital, your certificate may be issued by the hospital, rather than by the practice.

If your certificate runs out, but you are still sick, you will need to consult the doctor again before you can get a further certificate.

Fit certificates can be back-dated so it is not necessary to make an emergency appointment to renew your certificate. If you attend an emergency appointment for the purpose of getting a medical certificate you will be asked to rebook.