805 ILCS 20/4
It shall not be necessary for the Attorney-General to file an affidavit showing such officer or agent of such corporation resides or has gone out of the State, or on due inquiry cannot be found, or is concealed so that process cannot be served upon them, or that upon diligent inquiry the places of residence of such officers or agents cannot be ascertained.
(from Ch. 32, par. 193)
(Source: Laws 1935, p. 616.)