705 ILCS 110/1
It shall be unlawful for any clerk or deputy clerk of a circuit court to prepare or draft any document which is to be filed or recorded in the court in which he or she is clerk or deputy clerk, except such documents as such clerks are by statute or supreme court order required or authorized to draft or prepare; and that it shall be unlawful for any such clerk or deputy clerk to act as an administrator, executor or guardian, or to act as a trustee by appointment (of any court of which he or she is clerk or deputy clerk) or of the last will of any person who is not a family member of the clerk or deputy clerk.
For purposes of this Section, "family member" shall mean a spouse; child, natural or adopted; parent; brother; or sister of the clerk or deputy clerk.
705 ILCS 110/1