Every person authorized to request a correction must complete an Affidavit and Certificate of Correction Request. "What you want corrected" should indicate the item (e.g., child's first name, mother's date of birth, father's place of birth, marital status). 8. The Cook County Clerk's office keeps official records of births that occur in Chicago and suburban Cook County. We recommend that you enclose copies of all documents proving the right to inherit (e. g. The Cook County Clerk's office serves as the official record keeper for births, marriages and deaths that occur in Chicago and suburban Cook County. This article will serve as your compass, guiding you through the process of crafting a legally sound affidavit. Note that pdf and plc are lowercase.