Washington Revised Code Title 19. Business Regulations--Miscellaneous § 19.146.095. Fiduciary duties

(a) A mortgage broker must act in the borrower's best interest and in the utmost good faith toward the borrower, and shall disclose any and all interests to the borrower including, but not limited to, interests that may lie with the lender that are used to facilitate a borrower's request. A mortgage broker shall not accept, provide, or charge any undisclosed compensation or realize any undisclosed remuneration that inures to the benefit of the mortgage broker on an expenditure made for the borrower;

(b) A mortgage broker must carry out all lawful instructions provided by the borrower;

(c) A mortgage broker must disclose to the borrower all material facts of which the mortgage broker has knowledge that might reasonably affect the borrower's rights, interests, or ability to receive the borrower's intended benefit from the residential mortgage loan;

(d) A mortgage broker must use reasonable care in performing duties; and

(e) A mortgage broker must provide an accounting to the borrower for all money and property received from the borrower.