765 ILCS 10/3

It shall not be lawful for any court to make such order, except upon the petition, in writing, of the person entitled to the benefit of the same, or his or her heirs, setting forth the contract, bond or memorandum in writing, and fully describing the lands to be conveyed, nor until the person or persons so applying for such title shall have given reasonable notice of the time and place of such application to the executor, administrator and heirs of such person so deceased, or guardian of the person under legal disability, and shall have fully paid, discharged and fulfilled the consideration of such contract, bond or memorandum in writing, as to the premises sought to be conveyed to the petitioner, and the petitioner shall be entitled to a conveyance, according to the true intent, tenor and effect thereof.