Where the payment of an existing contract (a bill of exchange, promissory note, bond, or other evidence of indebtedness) is secured by an instrument creating a lien upon real estate, payment on the contract does not extend the lien beyond its original or extended period as against subsequent purchasers, optionees, mortgagees, creditors, or persons acquiring a lien upon the real estate, unless (1) a memorandum of the payment is recorded in the office of the recording district where the property is located; (2) the memorandum is recorded before the end of the statutory time for bringing an action upon the existing contract and extensions as exhibited by the terms of the recorded instrument; and (3) the memorandum is signed and acknowledged by the owner or the representative of the owner of the existing contract of indebtedness.
Alaska Legal Code