Mo. Rev. Stat. § 700.526: Abandonment deemed, when.

A manufactured home as defined in section 700.010 which is placed on the real estate of another under a rental agreement shall be deemed abandoned if:

(1) The real property owner has a reasonable belief that the homeowner has vacated the premises and intends not to return; and

(2) That rent is due and the homeowner has not paid such rent for thirty days; and

(3) The homeowner has failed to respond to the real property owner's notice of lien and abandonment set out in subsection 3 of section 700.527 by either failing to pay the rent or file a petition in the associate circuit court to contest the issue of abandonment and the lien.