An Illinois Child Custody Affidavit is a legal document used to establish the custody arrangements of a minor child or children in the State of Illinois. It is used to establish the rights of the parents or guardians to make decisions regarding the child’s health, education, and welfare and to allocate parental responsibilities. The affidavit is typically used when the parents cannot agree on a custody arrangement and must submit an agreement to the court. There are two types of Illinois Child Custody Affidavits: Joint Custody Affidavit and Sole Custody Affidavit. The Joint Custody Affidavit is used when both parents agree to share legal decision-making authority and responsibility for the child. The Sole Custody Affidavit is used when only one parent is granted legal decision-making authority and responsibility for the child. Both types of affidavits can include a visitation schedule, a parenting plan, and/or a plan for the allocation of parental responsibilities.