Mo. Rev. Stat. § 532.110
Current with changes from the 2023 Legislative Session
Such writs shall not be disobeyed for any defect of form; and anyone who shall be served therewith shall be deemed to be the person to whom it is directed, although it may be directed to him by a wrong name or description, or to another person; and to the end that no person may pretend ignorance therein, every writ of habeas corpus, issued under the provisions of this chapter, shall be endorsed with these words: "By the habeas corpus act".
§ 532.110, RSMo
RSMo 1939 § 1598