Mo. Rev. Stat. § 521.410
In all cases where property, effects or credits are attached, the defendant may file a motion to dissolve the attachment, verified by affidavit, putting in issue the truth of the facts alleged in the affidavit on which the attachment was sued out.
(RSMo 1939 § 1478, A.L. 1955 p. 776)
Prior revisions: 1929 § 1314; 1919 § 1765; 1909 § 2334