Indiana Code Title 23. Business and Other Associations § 23-1-40-5

Sec. 5. (a) After a plan of merger or share exchange is approved by the shareholders, or adopted by the board of directors if shareholder approval is not required, the surviving or acquiring corporation shall deliver to the secretary of state for filing articles of merger or share exchange setting forth:

(b) Unless a delayed effective date is specified, a merger or share exchange takes effect when the articles of merger or share exchange are filed.

(c) The surviving corporation resulting from a merger may, after the merger has become effective, file for record with the county recorder of each county in Indiana in which the corporation has real property at the time of the merger, the title to which will be transferred by the merger, a file-stamped copy of the articles of merger.  If the articles of merger set forth amendments to the articles of incorporation of the surviving corporation that change its corporate name, a file-stamped copy of the articles of merger may be filed for record with the county recorder of each county in Indiana in which the surviving or acquiring corporation has any real property at the time the merger becomes effective.  A failure to record a copy of the articles of merger under this subsection does not affect the validity of the merger or the change in corporate name.