A levy under a writ, warrant, or execution upon a judgment, must be made by serving a notice of levy upon the clerk of the court in which it is docketed, describing the judgment by the title of its action, date, amount, book, and page of docketing, and by mailing copies of such notice of attachment by registered or certified mail to the judgment debtor, and the present owner of the judgment as shown by the docket, and to their attorneys of record, if any, at their last known post office addresses.
SDCL 15-18-21