Wash. Rev. Code § 63.30.100
(1) Subject to RCW 63.30.120, a security is presumed abandoned three years after:
(2) If the holder does not send communications to the apparent owner of a security by first-class United States mail, the holder shall attempt to confirm the apparent owner's interest in the security by sending the apparent owner an email communication not later than two years after the apparent owner's last indication of interest in the security. However the holder promptly shall attempt to contact the apparent owner by first-class United States mail if:
[ 2022 c 225 s 207.]