Missouri Revised Statutes Title XXXV. Civil Procedure and Limitations § 506.510. Service, how made--affidavit

1. Service of process upon any person who is subject to the jurisdiction of the courts of this state, as provided in section 506.500, may be made by personally serving the process upon the defendant outside this state, or upon a corporation by serving the process upon a managing officer or any person or corporation who shall be designated as a registered agent by such corporation in any of the several states, and shall have the same force and effect as though the process had been served within this state.

2. The process, together with a copy of the petition, and necessary fees shall be sent to a court of record or court officer at the place where the defendant may be served with process, and may be personally served upon the defendant by the person authorized to serve process at that place.

3. An affidavit of the person serving the process shall be returned to the office of the clerk or judge from which it issued. The affidavit shall state the time, manner and place of service of the process and of the copy of the petition. The court may consider the affidavit, or any other competent evidence, in determining whether service has been properly made.