Ind. Code § 28-1-7-20

Sec. 20. The surviving or new corporation resulting from a merger or consolidation shall, within ten (10) days after such merger or consolidation becomes effective, file for record one (1) of the copies of the articles of merger or consolidation bearing the endorsement of the approval of the secretary of state, or a copy of such agreement and endorsement certified by the secretary of state, in the office of the recorder of each county in which the principal office of any of the corporations that are parties to the agreement is located.