Mo. Rev. Stat. § 443.240: Judgment on personal service.

When the mortgagor or debtor has been duly summoned, or appears to the action, the judgment, if for the plaintiff, shall be as in section 443.230 specified, with the addition that if the mortgaged property or collateral is not sufficient to satisfy the debt and damages, or damages and costs, then the residue is to be levied of other goods, chattels, lands and tenements of the mortgagor or debtor.