The Illinois Petition for Change of Name is a legal document that is used to request a change of name in the state of Illinois. It is most commonly used for adults who want to change their name in order to reflect a marriage, divorce, or other personal preference. There are three types of Illinois Petition for Change of Name: Adult Name Change, Minor Name Change, and Married Name Change. The Adult Name Change Petition is used to change the name of an adult who has been a resident of the state of Illinois for at least six months. The Minor Name Change Petition is used to change the name of a minor under 18 years of age. The Married Name Change Petition is used to change the name of a woman who has taken her husband's name upon marriage. All petitions must be filed in the county in which the petitioner resides. The petitioner must also be a resident of Illinois for at least six months prior to filing the petition.