Indiana Code Title 23. Business and Other Associations § 23-17-19-4

Sec. 4. (a) After a plan of merger is approved by the board of directors and if required by section 3 of this chapter by the members and any other persons, the surviving or acquiring corporation shall deliver to the secretary of state articles of merger setting forth the following:

(b) Unless a delayed effective date is specified, a merger takes effect when the articles of merger 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 a merging 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 plan of merger sets forth amendments to the articles of incorporation of the surviving corporation that change the surviving corporation's 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 corporation has 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.