Mo. Rev. Stat. § 30.245
There is hereby created a "Central Check Mailing Service Revolving Fund" within the state treasury, which shall be administered by the state treasurer. The state treasurer shall be custodian of the fund and shall receive funds paid or transferred to his office by state departments or agencies for centralized check mailing services rendered by the state treasurer. The commissioner of administration shall approve disbursements from the fund at the request of the state treasurer, or his designee, to purchase goods and services which will be utilized in providing a centralized check mailing service. The central check mailing service revolving fund shall be funded annually by appropriation, and any unencumbered balance in excess of fifty thousand dollars remaining at the end of each fiscal year shall revert to the general revenue fund in accordance with other provisions of law.
§ 30.245, RSMo