Massachusetts Catalytic Converter Laws

Selling Catalytic Converters in Massachusetts

Massachusetts has tightened laws around the sale and purchase of catalytic converters to combat rising thefts. If you’re looking to sell, here’s a quick guide — and how selling to RRCats (NJ‑based) can work for you.

Sell Us Your Converter

What the Law Says in Massachusetts

Under Mass. Gen. Laws c.266 §148 (effective January 2023):

  • Licensed scrap metal dealers must obtain proof of ID and ownership documentation before acquiring a catalytic converter.

  • They must keep records of each transaction including seller name, address, license plate number, converter description, photograph, price paid.

  • Records must be retained for 3 years.

  • Payments by licensees for transactions over $250 per customer/day or involving 3+ catalytic converters must be by company check (not cash).

  • Licensees may not purchase a converter from anyone other than a commercial enterprise or the vehicle’s owner.

  • Violations can result in civil fines: $300 for first offense, $550 second, $700 each subsequent plus $100 per converter sold illegally.

Selling to RRCats from Massachusetts

Because RRCats is located in New Jersey and handles shipments from outside Massachusetts:

  • You may legally ship your catalytic converter to us without navigating Massachusetts’ stricter in‑state buyer rules.

  • We still require you to provide proof of legal ownership and ID — ensuring full compliance.

  • Our process is secure, transparent and tailored for out‐of‐state shipments.

Need Help?

Want to check your converter’s value or see if it’s OEM? Visit our Cat Guide »

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Check corners, under shields, and down pipes for numbers. Not all catalytic converters have numbers.
Drag & Drop Files, Choose Files to Upload You can upload up to 10 files.
To get a quote sooner, attach photos of any serial numbers and an overhead pic of the catalytic converter(s).
Drag & Drop Files, Choose Files to Upload You can upload up to 3 files.
Upload a Photo: Please include a clear photo of one of the following documents: Vehicle or equipment, Registration, Title, or Bill of Sale. Why do we need this? We are required by law to verify proof of ownership before purchasing certain equipment or materials to prevent theft and ensure lawful transfer. For more details, refer to New Jersey Scrap Metal Laws – N.J.S.A. 13:1E-99.12 (or insert exact link to the statute you want to reference). This requirement is mandatory to receive a quote.

Who Is RRCats?

Nationwide catalytic converter buyers

Fair. Consistent. Reliable.

“Their online system works great. Verifying ID and proof of ownership worked smoothly and gave me confidence that I was dealing with a reputable company.”

~ Customer, Mike K.*

“Very fast service! I submitted my info for a quote and got it the next morning. The only thing that was slow about the process was me packing it all up to ship out!”

~ Customer, Steven C.*

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