A Will is important whether you are single, married, have children, own property or are living at home for so many reasons, principally for your peace of mind, to know that you are leaving things in order for those left behind. What is a Will? A Will is a written document which sets out your wishes as to what happens to your property and affairs on your death. Section 78 of the Succession Act provides that your Will should be signed in the presence of two witnesses.