Mo. Rev. Stat. § 447.536
Except for the abandonment period for travelers checks and money orders provided for in subdivision (3) of section 447.505; the abandonment period for dissolution of business associations, banking organizations and financial organizations as provided for in section 447.527; and the abandonment period for court-related bond proceeds as provided for in section 447.595; all other abandonment periods referenced in sections 447.505 to 447.595, shall change from seven to five years beginning January 1, 2000, with the exception of payroll checks which shall have the abandonment period reduced from five years to three years beginning January 1, 2015. The abandonment periods provision of this section shall not apply to property which is held pursuant to any resolution, order or trust indenture entered into prior to August 28, 1998, by a city, county, school district, authority, agency or other political subdivision where the abandonment period or other abandonment provision specified in the resolution, order or trust indenture is different than the abandonment period specified in this section.
§ 447.536, RSMo