Counterclaim set up by amendment, when.

Mo. Rev. Stat. § 509.450
in effect
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509.450. Counterclaim set up by amendment, when. — When a pleader fails to set up a counterclaim through oversight, inadvertence, or excusable neglect, or when justice requires he may by leave of court set up the counterclaim by amendment. (L. 1943 p. 353 § 76)
Source: Open US Law by Vaquill AI (CC BY 4.0)URL: https://revisor.mo.gov/main/OneSection.aspx?section=509.450Fetched: 10/17/2026

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