SDCL § 44-2-4: Lien statement covering personal property--Condition precedent to filing--Mailing of copy to owner of property.

Before filing such lien statement, the person claiming the lien shall mail to the property owner at his last known post office address, by registered or certified mail, a copy of such lien statement and the post office receipt for such mailing shall be attached to the lien statement and filed in the office of the register of deeds.