Wyo. Stat. § 9-4-809 (2026)

As used in W.S. 9-4-809 through 9-4-812 and 9-4-817 "time
deposit, open account" means a deposit, other than a "time
certificate of deposit" or a "savings deposit", with respect to
which "time deposit, open account" there is in force a written
contract between the depositor and the depository bank or credit
union that neither the whole or any part of the deposit may be
withdrawn by the depositor, by check or otherwise, prior to the
date of maturity or returned to the depositor by the depository,
prior to the date of maturity, without written notice given not
less than forty-five (45) days in advance of withdrawals or
returns.