RCW 63.30.160: Address of apparent owner in Washington state.

The administrator may take custody of property that is presumed abandoned, whether located in this state, another state, or a foreign country if:

(1) The last known address of the apparent owner in the records of the holder is in this state; or

(2) The records of the holder do not reflect the identity or last known address of the apparent owner, but the administrator has determined that the last known address of the apparent owner is in this state.