An Illinois Order Declaring Warship is a legal document issued by a probate court in the state of Illinois which outlines the heirs of an estate of a person who has died without having left a valid will. It is an official document that establishes the descendants of a deceased person who are legally entitled to inherit a portion of the estate. The order is used in the absence of a valid will or other testamentary document that determines the succession of an estate. There are two types of Illinois Order Declaring Warship: a voluntary order and an involuntary order. A voluntary order is obtained by agreement of all the heirs, while an involuntary order is issued when the heirs cannot agree on the succession of the estate. In either case, the court will appoint a representative to manage the estate and distribute the assets according to the Order.