Washington Revised Code Title 11. Probate and Trust Law § 11.106.020. Trustee's annual statement

The trustee or trustees appointed by any will, deed, or agreement executed must mail or deliver at least annually to each permissible distributee, as defined in RCW 11.98.002, a written itemized statement of all current receipts and disbursements made by the trustee of the funds of the trust both principal and income, and upon the request of any such beneficiary must furnish the beneficiary an itemized statement of all property then held by that trustee, and may also file any such statement in the superior court of the county in which the trustee or one of the trustees resides.