Section 452.370 - Modification of judgment as to maintenance or support, when - termination, when - rights of state when an assignment of support has been made - court to have continuing jurisdiction, duties of clerk, clerk to be "appropriate agent", when - severance of responsive pleading1. Except as otherwise provided in subsection 6 of section 452.325, the provisions of any judgment respecting maintenance or support may be modified only upon a showing of changed circumstances so substantial and continuing as to make the terms unreasonable. In a proceeding for modification of any child support or maintenance judgment, the court, in determining whether or not a substantial change in circumstances has occurred, shall consider all financial resources of both parties, including the extent to which the reasonable expenses of either party are, or should be, shared by a spouse or other person with whom he or she cohabits, and the earning capacity of a party who is not employed. If the application of the child support guidelines and criteria set forth in section 452.340 and applicable supreme court rules to the financial circumstances of the parties would result in a change of child support from the existing amount by twenty percent or more, a prima facie showing has been made of a change of circumstances so substantial and continuing as to make the present terms unreasonable, if the existing amount was based upon the presumed amount pursuant to the child support guidelines.2. When the party seeking modification has met the burden of proof set forth in subsection 1 of this section, the child support shall be determined in conformity with criteria set forth in section 452.340 and applicable supreme court rules.3. Unless otherwise agreed in writing or expressly provided in the judgment, the obligation to pay future statutory maintenance is terminated upon the death of either party or the remarriage of the party receiving maintenance.4. Unless otherwise agreed in writing or expressly provided in the judgment, provisions for the support of a child are terminated by emancipation of the child. The parent entitled to receive child support shall have the duty to notify the parent obligated to pay support of the child's emancipation and failing to do so, the parent entitled to receive child support shall be liable to the parent obligated to pay support for child support paid following emancipation of a minor child, plus interest.5. If a parent has made an assignment of support rights to the family support division on behalf of the state as a condition of eligibility for benefits pursuant to the Temporary Assistance for Needy Families program and either party initiates a motion to modify the support obligation by reducing it, the state of Missouri shall be named as a party to the proceeding. The state shall be served with a copy of the motion by sending it by certified mail to the director of the family support division.6. The court shall have continuing personal jurisdiction over both the obligee and the obligor of a court order for child support or maintenance for the purpose of modifying such order. Both obligee and obligor shall notify, in writing, the clerk of the court in which the support or maintenance order was entered of any change of mailing address. If personal service of the motion cannot be had in this state, the motion to modify and notice of hearing shall be served outside the state as provided by supreme court rule 54.14. The order may be modified only as to support or maintenance installments which accrued subsequent to the date of personal service. For the purpose of 42 U.S.C. Section 666(a)(9)(C), the circuit clerk shall be considered the appropriate agent to receive notice of the motion to modify for the obligee or the obligor, but only in those instances in which personal service could not be had in this state.7. If a responsive pleading raising the issues of custody or visitation is filed in response to a motion to modify child support filed at the request of the family support division by a prosecuting attorney or circuit attorney or an attorney under contract with the division, such responsive pleading shall be severed upon request.8. Notwithstanding any provision of this section which requires a showing of substantial and continuing change in circumstances, in a IV-D case filed pursuant to this section by the family support division as provided in section 454.400, the court shall modify a support order in accordance with the guidelines and criteria set forth in supreme court rule 88.01 and any regulations thereunder if the amount in the current order differs from the amount which would be ordered in accordance with such guidelines or regulations.Amended by 2014 Mo. Laws, HRB 1299,s A, eff. 8/28/2014.L. 1973 H.B. 315 § 15, A.L. 1982 S.B. 468, A.L. 1986 H.B. 1479, A.L. 1987 H.B. 484, A.L. 1988 H.B. 1272, et al., A.L. 1990 S.B. 834, A.L. 1993 S.B. 253, A.L. 1994 H.B. 1491 & 1134, A.L. 1997 S.B. 361, A.L. 1998 S.B. 910