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.