RCW 29B.40.080: Expenditures—Authorization of and restrictions on.

No expenditures may be made or incurred by any candidate or political committee unless authorized by the candidate or the person or persons named on the candidate's or committee's registration form. A record of all such expenditures shall be maintained by the treasurer.

No expenditure of more than fifty dollars may be made in currency unless a receipt, signed by the recipient and by the candidate or treasurer, is prepared and made a part of the campaign's or political committee's financial records.