205 ILCS 670/3
Every licensee shall appoint, in writing, the Director of Financial Institutions (hereinafter called Director) and his successors in office or any official who shall hereafter be charged with the administration of this Act, as attorney-in-fact upon whom all lawful process against such licensee may be served with the same legal force and validity as if served on such licensee. A copy of such written appointment, duly certified, shall be filed in the office of the Director; and a copy thereof certified by him shall be sufficient evidence. This appointment shall remain in effect while any liability remains outstanding in this State against the licensee. When summons is served upon the Director as attorney-in-fact for such licensee, the Director shall immediately notify the licensee by registered mail, enclosing the summons and specifying the hour and day of service.
205 ILCS 670/3