RCW 63.48.010Accounts presumed abandoned and to escheat to state.All postal savings system accounts created by the deposits of persons whose last known addresses are in the state which have not been claimed by the persons entitled thereto before May 1, 1971, are presumed to have been abandoned by their owners and are declared to escheat and become the property of this state.[ 1971 ex.s. c 68 s 1.]
Washington Legal Code