Mo. Rev. Stat. § 442.050
A married woman may convey her real estate or relinquish her dower in the real estate or relinquish her dower in the real estate of her husband, by a power of attorney authorizing its conveyance, executed and acknowledged by her jointly with her husband, as deeds conveying such real estate by them are required to be executed and acknowledged.
(RSMo 1939 § 3403)
Prior revisions: 1929 § 3016; 1919 § 2176; 1909 § 2789