Mo. Rev. Stat. § 428.115
Any person who attempts to file a lien against real or personal property that is rejected pursuant to subsection 1 of section 428.110 may petition the circuit court of the county of the filing officer that rejected such lien for an order, which may be granted ex parte, directing the filing officer to file or record the lien pending a hearing on whether the lien constitutes a nonconsensual common law lien. The lien claimant shall appear before the court as the petitioner within ten business days following the date of service of the petition and order on the filing officer, and show cause, if any, why the lien should not be declared void and other relief provided for by section 428.125 should not be granted. The petition shall state the grounds upon which relief is requested, and shall be supported by the affidavit of the petitioner or the petitioner's attorney setting forth a concise statement of the facts upon which the claim for relief is based.
§ 428.115, RSMo