RCW 33.20.190

An association may, on instruction from a depositor, effect withdrawals from the depositor's account by the association's drafts payable to parties and on terms as so instructed. An association may allow a depositor to effect withdrawals or transfers from the depositor's account upon negotiable or transferable order or authorization to the association. To the extent of the subjection of accounts to such withdrawal instructions or orders, such accounts may be specifically classified under RCW 33.20.180 and ineligible to receive interest or eligible only for limited interest.