Mo. Rev. Stat. § 526.100
526.100 Notice, to whom given.
526.100. Notice, to whom given. — Before an injunction shall be granted to stay any proceedings, the applicant shall give reasonable notice, in writing, to the adverse party, if within the state, or to his known agent or attorney, if he has any in the state.
(RSMo 1939 § 1666) Prior revisions: 1929 § 1502; 1919 § 1952; 1909 § 2517