Mo. Rev. Stat. § 204.628
Any user fees or charges, connection fees, or other charges levied by the reorganized common sewer district to fund its general or special operations, maintenance, or payment of bonded indebtedness or other indebtedness shall be due at such time or times as specified by the reorganized common sewer district, and shall, if not paid by the due date, become delinquent and shall bear interest from the date of delinquency until paid. In addition to and consistent with any other provision of applicable law, if such fees or charges or other amounts due become delinquent, there shall be a lien upon the land, and a notice of delinquency shall be filed with the recorder of deeds in the county where the land is situated. The reorganized common sewer district shall file with the recorder of deeds a similar notice of satisfaction of debt when the delinquent amounts, plus interest and any recording fees or attorneys' fees, have been paid in full. The lien created may be enforced by foreclosure by power of sale vested in the reorganized common sewer district if the reorganized common sewer district adopts written rules for the exercise of power of sale consistent with the provisions of sections 443.290 to 443.325 which are recorded in the land records of the office of the recorder of deeds in each county in which the district is located. Otherwise, such lien shall be enforced by suit in the circuit court having jurisdiction against the property subject to the lien for judicial foreclosure and sale by special execution. Such suit may include a request for judgment against the persons responsible for payment of such delinquency as well as the person or persons owning the property to which services were provided, if different, including post-sale deficiency, and as a part of the relief, may include award of the district's reasonable attorney's fees, court costs, and other expenses reasonably incurred by the district for collection.
§ 204.628, RSMo