SDCL § 25-7-6.20: Lien on payment or installment of support under an order of support--Notice.

Any payment or installment of support under an order for support, as defined by § 25-7A-1, whether entered by a court or an administrative entity of this state or any other state or jurisdiction, which is unpaid after the date it is due, is a lien by operation of law, with the full force and effect and attributes of a lien of this state, including enforceability, and is entitled, as a lien, to full faith and credit in this state.

In order to preserve such lien, any Title IV-D agency may perfect and enforce a lien authorized by this section in the same manner as liens are perfected for the specific type of real and personal property upon which the lien is claimed. The priority of the lien shall be established as of its date of filing. The register of deeds office is not entitled to any fee for registering or filing any lien under this section.

However, no lien is attached to any real or personal property which the obligor has transferred to another person who has purchased the property in good faith, for value, prior to the time that the Title IV-D agency's lien on the property has been perfected in the manner provided by law.