A licensee must provide, to each person sold a hearing aid, a receipt that contains the:
A copy of the original sales order constitutes a valid receipt and a legal bill of sale, and the purchaser's signature constitutes full acknowledgment of the terms of the sale. Any purchaser of a hearing aid is entitled to a refund of the full purchase price advanced by the purchaser for the hearing aid, less a maximum of ten percent, upon the return of the hearing aid by the purchaser to the licensee within thirty days from the date of delivery unless set by contract for more than thirty days. Any refund must be paid within thirty days of the return date. A violation of this section is a Class 2 misdemeanor.
SDCL 36-24-33