Mo. Rev. Stat. § 452.342: Summary of expenses paid on behalf of child, required when.

The court which issued a judgment or order of child support payments may, upon petition of the party obligated to make the payments and upon good cause shown, order the custodial parent to furnish the party having the support obligation with a regular summary of expenses paid by the custodial parent on behalf of the child. The court may prescribe the form and substance of the summary.