750 ILCS 5/707
A certificate of each dissolution of marriage or declaration of invalidity of marriage ordered in this State shall be filed with the Illinois Department of Public Health on a form furnished by such Department. The form shall contain the social security numbers of the parties whose marriage has been dissolved or declared invalid. This form shall be prepared by the person filing the petition for dissolution of marriage or declaration of invalidity of marriage and shall be presented to the judge of the court for his inspection prior to the entry of the final order. Failure to comply with this Act shall not invalidate any judgment of dissolution of marriage or declaration of invalidity of marriage. Immediately after the judgment is granted, the clerk of the court shall complete the remaining entries on the certificate. Within 45 days after the close of the month in which the judgment is rendered, the clerk shall forward the certificate to the Illinois Department of Public Health.
750 ILCS 5/707