509.440. When claim may be presented as counterclaim by supplemental pleading. - Missouri Statutes

When claim may be presented as counterclaim by supplemental pleading.

509.440. A claim which either matured or was acquired by thepleader after serving his pleading may, with the permission ofthe court, be presented as a counterclaim by supplementalpleading.

(L. 1943 p. 353 § 75)