Seller ID, bill of sale and a permanent record on every purchase — so "who sold you this cat?" has a one-click answer.
Buying catalytic converters and junk cars is getting watched. More states and provinces now require you to record who you bought from, prove you had their ID, and keep a bill of sale — especially on loose converters, because of theft. Get it wrong and you're not looking at a bad deal, you're looking at fines or charges. Most buyers keep this in a shoebox, a notebook, or nowhere.
It keeps the paperwork you're legally supposed to keep — automatically, as part of buying. Register a seller once with their ID. Every purchase records the VIN, the seller, the price, and a bill of sale. When someone asks "who sold you this cat?" — police, an auditor, an insurer — you pull it up in one click instead of digging through paper.
Taking converters from shops? ID and bill of sale captured every time.
Clean records for audits and insurance.
Buyers getting charged for cats with no paper trail — this is the paper trail.
This is the part nobody wants to think about until it's a problem — and then it's a big one. Compliance turns "I hope my records are okay" into "here's exactly who sold me this, when, for how much, with their ID." It protects your business, and it's the kind of thing that separates a real operation from one that's one audit away from trouble.
Legal requirements vary by state and province. Set your required fields and retention to match where you operate — these tools help you keep records, they are not legal advice.