Idaho Code § 39-1807
The hotelkeeper shall retain such baggage and other property upon which he has a lien as provided in section 39-1806, Idaho Code, for a period of thirty (30) days. At the expiration of such time if such lien is not fully satisfied he may proceed to sell such baggage and other personal property or a part thereof at public auction after posting notice of the sale as provided by law upon execution, and by mailing a notice fifteen (15) days prior to the sale by registered mail of the time and place of such sale to such guest at the address given by the guest on the hotel register. The proceeds of the sale shall be applied first to cost of the sale and attorney's fees and then to the discharge of the lien. The remainder, if any, must be paid to the guest. Provided, however, if the hotelkeeper knew that the property brought upon his premises was not, when brought, legally in possession of such guest, or had written notice that such property was not then the property of such guest, at the time when such charges or indebtedness were incurred, such property shall not be subject to the lien or sale as hereinbefore provided.
Idaho Code § 39-1807