Key documents to request and verify: 1. Export declaration (报关单): proves the car legally left China. Check the VIN, model and exporter name match the car. 2. Commercial invoice: must match your payment amount; customs uses it to assess duties. 3. Bill of lading: confirm the consignee is you or your agent, and the VIN/container number is correct. 4. Certificate of origin: needed for tariff preferences in some markets. 5. Condition/inspection report: ideally from an independent third party, with photos and dates. Verification tips: cross-check the VIN on every document — any mismatch causes customs holds. Ask your destination customs broker to review scanned copies before the car ships, and release the final payment only after documents pass that review. A legitimate exporter will provide all of these without hesitation.

Rust is one of the most underestimated problems in remote buying. Request specific evidence: photos of the underbody, wheel arches, door sills, and around the windshield seal; close-ups of suspension mounting points; and ideally paint thickness readings across panels (factory paint is typically 80-120μm; heavy patches suggest bodywork). Northern Chinese cars may have winter road-salt corrosion; coastal cars can show surface rust on exposed metal. Surface rust on exhaust and bolts is normal—structural rust on frame rails, subframes, or brake lines is a deal-breaker, especially if the car is headed to a humid or coastal market. Have the inspector tap suspicious areas during the video call: flaky or bubbling metal sounds hollow. Walk away if the seller refuses underbody photos.

The key document is the 机动车登记证书 (Vehicle Registration Certificate), the green booklet proving ownership. Along with it, the seller should provide the 行驶证 (driving license for the vehicle) and their ID. Verification steps: 1. Check that the VIN/chassis number on the certificate matches the car exactly, stamped on the dashboard and door frame 2. The certificate's 所有人 (owner) field must match the seller's company name or the export agent they claim to work with 3. Look at the registration history pages—frequent transfers in a short period can indicate problem cars being flipped 4. Confirm the car is not marked 抵押 (mortgaged/pledged to a bank) Be cautious if the seller only shows photos of these documents and refuses a live video panning across the original booklet with the day's newspaper. Also verify the export company has 二手车出口资质 (used-car export qualification)—a legitimate exporter will share their license number, which you can cross-check on Chinese commerce bureau websites.