Alaska Stat. § 43.31.310
The estate of each decedent whose property is subject to the laws of the state is considered prima facie liable for estate taxes under this chapter, and is subject to a lien for them in an amount which may be later determined to be due and payable on the estate as provided in this chapter. The presumption of liability begins on the date of the death of the decedent and continues until the full settlement of all taxes which may be found to be due under this chapter, the settlement to be shown by receipts for all taxes due to be issued by the department as provided for in this chapter. Whenever it appears to the department that an estate is not subject to a tax under this chapter the department shall issue to the executor, administrator, curator or other personal representative, or to the heirs, devisees, or legatees of the decedent, a certificate in writing to that effect, showing nonliability to tax, which certificate of nonliability has the same effect as a receipt showing payment. The certificate of nonliability is subject to record and admissible in evidence in like manner as receipts showing payment of taxes. There shall be paid to the department a fee of $2.50 for each certificate so issued.
AS 43.31.310