Mo. Rev. Stat. § 67.810
Any nonresident property owner may file with the county clerk, the circuit clerk, the city clerk, or clerk of any political subdivision, who is required by law to publish notices required by general law in regard to the formation of special taxing districts for public works or public improvements, or in regard to the imposition of special assessments by such special taxing districts, an affidavit requesting copies of such notices. The affidavit shall specify the notices to be required by the nonresident property owner by reference to the particular statutes which provide for publication of such notices, and the duty of the various clerks to provide notice shall be limited to those specific notices requested in the affidavit. The affidavit shall be accompanied by a self-addressed envelope together with sufficient postage for the mailing of any notice by certified mail. The affidavit shall also be accompanied by a fee of one dollar payable to the political subdivision.
§ 67.810, RSMo