The Illinois Affidavit of Heirship-No Surviving Spouse or Descendant is a legal document that is used to establish the heirs of a deceased person who died without leaving a will or any other written record of their wishes for their estate. It is generally used when the deceased person had no surviving spouse, children, or other direct descendants. This affidavit is signed by two or more people who have knowledge of the deceased's family history and can testify to the accuracy of the information contained within. There are two types of Illinois Affidavit of Heirship-No Surviving Spouse or Descendant: 1) Formal Affidavit of Heirship-No Surviving Spouse or Descendant and 2) Informal Affidavit of Heirship-No Surviving Spouse or Descendant. The formal affidavit is the more complicated of the two and requires the assistance of an attorney. It involves the filing of a petition with the court and the filing of supporting documentation. The informal affidavit does not require any court involvement and can be completed by the individual witnesses signing the affidavit. In either case, the affidavit must include information such as the deceased’s name, date of death, the relationship of the witnesses to the deceased, and the relationship of the heirs to the deceased.