Making a will is a wise thing to do for any one of legal age, whether married, single or in a de facto relationship. A solicitor or the Public Trustee will advise and assist with correct drafting of the will. Once made, it is recommended to review the contents periodically to ensure that the Will is kept up to date, especially if your personal circumstances change.
It is also wise to note your wishes in a more readily accessible document in a place known to your family or legal representative. If you have pre-arranged your funeral service, it is of paramount importance that it be known to your family and the documents be readily available (not kept in a bank or other secure facility).