RCW 46.63.105
RCW 46.63.105: City attorney, county prosecutor, or other prosecuting authority—Filing an infraction—Contribution, donation, payment.
A city attorney, county prosecutor, or other prosecuting authority may not dismiss, amend, or agree not to file an infraction in exchange for a contribution, donation, or payment to any person, corporation, or organization. This does not prohibit: (1) Contribution, donation, or payment to any specific fund authorized by state statute; (2) The collection of costs associated with actual supervision, treatment, or collection of restitution under agreements to defer or divert; or (3) Dismissal following payment that is authorized by any other statute.