Alaska Stat. § 18.55.870
The corporation shall serve complaints and orders issued in accordance with AS 18.55.480 - 18.55.960 upon all parties in interest either personally or by registered mail. If, after the exercise of reasonable diligence, the corporation cannot find a party, it shall make an affidavit to that effect, and it may then effect service by publishing the complaint or order once each week for two consecutive weeks in a newspaper printed and published in the municipality, or, if there is none, in a newspaper printed and published in the state and circulated in the municipality in which the dwelling is located. The corporation shall also post a copy of the complaint or order in a conspicuous place on the premises affected and file a copy with the clerk of the superior court in the judicial district in which the dwelling is located. The filing of the complaint or order with the clerk has the same effect as other lis pendens notices provided by law.
AS 18.55.870