Alaska Stat. § 34.20.120
(a) The trustee under a trust deed upon real property given to secure an obligation to pay money and conferring no duties upon the trustee other than the duties that are incidental to the exercise of the power of sale conferred in the deed may be substituted by recording in the mortgage records of the recording district in which the property is located a substitution executed and acknowledged by
(b) The substitution must contain