S.D. Codified Laws § 32-3-68
A person may apply for a title on any motor vehicle that is left unclaimed, as the result of an unpaid repair bill, by its owner or person lawfully in possession of, on private property for a period of thirty days after written notice of intent to apply for a title is given to the owner at the owner's last known address and to any readily identifiable insurer or lien holder by certified mail. The notice shall set forth the location where the motor vehicle is being kept, the circumstances surrounding acquisition of the vehicle, the year, make, model, and serial number of the motor vehicle, and shall inform the owner, insurer, and any lien holder of the right to reclaim the vehicle as provided by § 32-3-69. The notice shall be on a form provided by the department.
If it is impossible to determine with reasonable certainty the identity and address of the registered owner, insurer, and any lien holder, a notice shall be published once in a newspaper of general circulation in the area where the motor vehicle was left for repair. Published notices may be grouped together for convenience and economy.
SDCL 32-3-68