Verification Checklist: To distinguish a genuine Chinese metal stamping manufacturer from a middleman/trading agency, demand 3 hard proofs before placing an RFQ: 1) Unified Social Credit Code (USCC) showing “Manufacturing/Machining” in its registered business scope; 2) Live video inspection showing on-site punch presses (80T–400T), wire EDM toolroom, and CMM equipment; 3) Stamping die ownership plates permanently riveted to tooling blocks with customer-specific part numbers.
Factory Direct Truth: Hebei Weizhi operates an in-house 9,000m² manufacturing base in Nanpi, Hebei (est. 1999) with third-party verified on-site audit reports by TÜV Rheinland and Intertek.
Why supplier verification matters
A capable stamping partner should be able to connect its legal entity, equipment, tooling, quality records, and shipping history. A polished website is not proof of manufacturing capacity. Use a document-first audit before spending time on detailed tooling quotations.
Real factory vs. trading agency
| Evidence | Genuine stamping factory | Trading agency warning sign |
|---|---|---|
| Legal registration | USCC and business scope identify manufacturing or machining activities. | Business scope is limited to sales, import/export, consulting, or wholesale. |
| Equipment | Live camera walk-through shows identifiable presses, dies, inspection equipment, and operators. | Only showroom images, rented equipment, or a visit arranged at another company. |
| Tooling control | Die blocks carry permanent ownership plates and customer part numbers. | Tooling inventory is unavailable or ownership cannot be traced. |
| Quality records | Provides sample inspection reports, calibration status, and lot traceability. | Reports are generic, undated, or cannot be matched to a production lot. |
On-site audit checklist
- Match the company name and address on the USCC certificate to the factory gate, payroll entity, and bank beneficiary.
- Record a live walk-through from raw material storage to press line, secondary operations, inspection, packing, and finished-goods dispatch.
- Ask the operator to demonstrate a press setup and show tonnage, stroke, die number, and current job traveler.
- Review incoming material certificates, first-article approval, in-process checks, final inspection, and nonconformance records.
- Confirm whether the quoted process is performed in-house or subcontracted, including plating, heat treatment, and welding.
How to verify the die and toolroom
Tooling is the clearest physical test of a stamping supplier. Check that progressive and transfer dies have an identification plate, revision, customer part number, maintenance history, and ownership status. In the toolroom, inspect wire EDM capacity, surface grinders, milling machines, spare inserts, and a preventive-maintenance log. Ask for photographs or a screen share that shows the same die in the quotation and the production schedule.
Red flags that should stop an RFQ
- The supplier refuses a live video call or will not show the factory address.
- USCC details do not match the quotation, invoice, website, or receiving bank account.
- Press capacities are listed but no serial numbers, operators, or current jobs can be shown.
- The supplier promises every process internally but cannot identify the subcontractor and control plan.
- Tooling ownership, storage, and return terms are absent from the quotation.
FAQ
What should I request before an RFQ?
Request the USCC certificate, manufacturing scope, equipment list, recent inspection sample, factory address, and a live video audit. For a production project, also request tooling ownership and maintenance terms.
Can a trading company still manage production well?
Yes, but it must disclose the actual factory and remain accountable for quality, traceability, and corrective action. Contract terms should name the manufacturing site and define who owns the dies.
How can I validate a remote audit?
Ask for a continuous walk-through with time-stamped views of the gate, presses, toolroom, CMM, material racks, and packing area. Match serial numbers and job travelers to the documents shared afterward.