Mo. Rev. Stat. § 441.070
441.070 No notice necessary, when.
441.070. No notice necessary, when. — No notice to quit shall be necessary from or to a tenant whose term is to end at a certain time, or when, by special agreement, notice is dispensed with.
(RSMo 1939 § 2972) Prior revisions: 1929 § 2585; 1919 § 6881; 1909 § 7884