A bank is under no obligation to a customer having a checking account to pay a check, other than a certified check, that is presented more than six months after its date, but it may charge its customer's account for a payment made later in good faith.
AS 45.04.404
Bank not obligated to pay check more than six months old
Known as the Uniform Commercial Code
The act spans §§ 45–45 (615 sections).
Official source: Alaska State Legislature. Reproduced from public-domain Alaska statutes; confirm against the official source for the current text. Not legal advice.