No contribution shall be deposited by any candidate or treasurer who believes, from the face of the contribution instrument or for any other reason, the contribution was made in a fictitious name, by one person through an agent, relative, political committee, or any other person so as to conceal the source of the contribution or to exceed the contribution limits provided in RCW 42.17A.420, 42.17A.405, or 42.17A.410, as adjusted by WAC 390-05-400, or otherwise violate the act. The candidate or treasurer shall return such contributions within 10 days to the original contributor if his or her identity is known. Otherwise, the contribution instrument shall be endorsed and made payable to "Washington state treasurer" and the contribution sent to the commission for deposit in the state's general fund.