Mo. Rev. Stat. § 428.135: Liability for filing or recording certain documents.

Any person who records or files in the office of a filing officer:

(1) Any document purporting to create a nonconsensual common law lien against real or personal property; or

(2) A notice of invalid lien pursuant to subsection 2 of section 428.110 with respect to a valid lien and which the filer knew to be false at the time of filing;

shall be liable to the damaged party for actual damages or five thousand dollars, whichever is greater plus costs and reasonable attorney's fees.