750 ILCS 5/410

Process - Practice - Proceedings - Publication.) The process, practice and proceedings under this Act shall be the same as in other civil cases, except as otherwise provided by this Act, or by any law or rule of court, and except that when the parties resided in a municipality, in a county with a population under 2,000,000, at the time the cause of action arose, and if service by publication is necessary, publication shall be in a newspaper published in such municipality if there is one.