Hawaii Revised Statutes Division 1. Government § 231-63

All real property on which a lien for state taxes exists may be sold by way of foreclosure without suit by the state tax collector, and in case any lien, or any part thereof, has existed thereon for three years, shall be sold by the state tax collector at public auction to the highest bidder, for cash, to satisfy the lien, together with all interest, penalties, costs, and expenses due or incurred on account of the tax, lien, and sale, the surplus, if any, to be rendered to the person thereto entitled. The sale shall be held at any public place proper for sales on execution, after notice published at least once a week for at least four successive weeks immediately prior thereto in any newspaper with a general circulation of at least sixty thousand published in the State and any newspaper of general circulation published and distributed in the taxation district wherein the property to be sold is situated, if there is a newspaper published in the taxation district.

If the address of the owner is known or can be ascertained by due diligence, including an abstract of title or title search, the state tax collector shall send to each owner notice of the proposed sale by registered mail, with request for return receipt. If the address of the owner is unknown, the state tax collector shall send a notice to the owner at the owner's last known address as shown on the records of the department of taxation. The notice shall be deposited in the mail at least forty-five days prior to the date set for the sale. The notice shall also be posted for a like period in at least three conspicuous public places within such taxation district, and if the land is improved one of the three postings shall be on the land.