805 ILCS 30/8
If the agreement or agreements aforesaid shall be approved at each of such meetings of the respective stockholders of each company separately, in the manner herein described, the same shall be the agreement or agreements of such companies respectively, and a sworn copy of the proceedings of such meetings, made by the secretaries thereof, respectively, shall be presumptive evidence of the holding and actions of such meetings. A certificate of such sale and purchase or lease, or of such consolidation and merger, shall be made by the president of each of the companies, under the seal of the company, and verified by his affidavit, and shall be filed in the office of the Secretary of State, and of the recorder in the county where such companies carry on their business, whereupon the agreement or agreements aforesaid shall be in full force and effect. The companies, parties to the agreement or agreements, which provide for consolidation and merger, shall thereupon be and are hereby declared to be consolidated and merged into the one corporation specified in such agreement or agreements. Upon the purchase or lease or consolidation and merger hereby authorized being perfected, a notice thereof shall be published in some newspaper in the county in which the principal office of such corporation is located, for three successive weeks.
805 ILCS 30/8