Yes. To obtain a license to enter into a civil union, you must submit an application to a county clerk's office. You may submit the application to any county clerk's office in the state. A license is valid only in the county where it was issued and thus must be certified in that county.
The application requests basic information about you and your partner such as your names, sexes, occupations, address(es), social security numbers, dates of birth, and places of birth, as well as the names and addresses of your parents or guardians. You must also state whether you and your partner are related to each other and, if so, your relationship to each other. In addition, if you or your partner were previously married or in a civil union or substantially similar legal relationship, you must provide the name, date, place, and court in which the marriage, civil union, or other legal relationship was dissolved or declared invalid or the date and place of the former spouse or partner's death.
You may also need to provide proof to the county clerk that you and your partner are not prohibited from entering into a civil union. Illinois prohibits you from entering into a civil union if you or your partner are under 18 years old or with sworn consent of your parents or legal guardians if you or your partner are 16 or 17 years old. Proof of your age may include your birth certificate, passport, driver's license, or an employment certificate. You are also prohibited from entering into a civil union if you or your partner are already married or in a civil union or substantially similar legal union that has not been dissolved. Proof that your prior marriage, civil union, or substantially similar legal relationship has been dissolved may include a certified copy of your divorce or dissolution decree. If your prior spouse or partner died, you may be asked to provide a certified copy of his or her death certificate. You may also be prohibited from entering into a civil union if you and your partner are too closely related to each other.
Once you and your partner have submitted the application, the filing fee (described below), and any required proof that you are not prohibited from entering into a civil union, the county clerk will issue you a license to enter into a civil union.