Washington Revised Code Title 46. Motor Vehicles § 46.70.350. Catalytic converters marking (Effective April 1, 2025)

(1) A vehicle dealer shall, prior to the sale and transfer of a vehicle, offer the purchaser the option to have the dealer clearly and permanently mark the last eight digits of the originating vehicle's vehicle identification number on the vehicle's catalytic converter unless such marking already exists on the catalytic converter, the catalytic converter is not in a location where it is clearly visible and readily accessible to mark without the need to remove parts from the vehicle, or the vehicle is sold at wholesale. A clear and permanent mark applied by permanent marker is sufficient. The vehicle dealer may add a fee to the sale price for the marking if separately delineated and clearly marked.

(2) If a consumer elects not to have the vehicle dealer mark the vehicle's catalytic converter as provided in subsection (1) of this section, the vehicle dealer must provide the consumer a disclosure written in a typeface that is at least as large as the typeface used in the standard text of the document that contains the disclosure and that is boldfaced, capitalized, underlined, or otherwise set out from the surrounding material so as to be conspicuous that (a) the purchaser is knowingly purchasing the vehicle without clearly and permanently marking the catalytic converter prior to the sale and transfer of the vehicle; and (b) the purchaser acknowledges and understands that catalytic converters must be marked as provided in RCW 9A.82.180.