RCW 48.07.100: Vouchers for expenditures.

(1) No domestic insurer shall make any disbursement of twenty-five dollars or more, unless evidenced by a voucher correctly describing the consideration for the payment and supported by a check or receipt endorsed or signed by or on behalf of the person receiving the money.

(2) If the disbursement is for services and reimbursement, the voucher shall describe the services and itemize the expenditures.

(3) If the disbursement is in connection with any matter pending before any legislature or public body or before any public official, the voucher shall also correctly describe the nature of the matter and of the insurer's interest therein.