Mo. Rev. Stat. § 287.720

If any such insurance carrier shall withdraw from business in this state before the tax shall fall due according to the provisions of this chapter, or shall fail or neglect to pay the tax imposed herein, the department of revenue shall at once proceed to collect the same, and it is hereby empowered and authorized to employ such legal process as may be necessary for that purpose and when so collected it * shall pay the same into the state treasury as a part of the fund for the support of the Missouri workers' compensation division. The suit may be brought by the department of revenue, in any court of this state having jurisdiction, reasonable attorney's fees may be taxed as costs therein, and process may issue to any county of the state, and may be served as in civil actions or in cases of unincorporated associations, partnerships, interindemnity contracts or other plans or scheme upon the principal agent of the parties thereto.