Mo. R. Civ. P. 76.17. — Notice to Person Whose Land is Levied Upon

At least thirty days before the sale of land the judgment creditor shall serve a notice of sale on the person whose land is levied upon by personal service or by mailing a copy thereof to the person's last known address.

Service may be shown by acknowledgment of receipt, written return of service, or by affidavit or by written certificate of counsel making such mailing.

Proof of service shall be filed in the court.