By SteelDesk Tangshan · Updated
Start with a small, dated evidence index
Keep copies of the quotation, business licence, proposed contract, sample material certificates, packing requirements and payment instructions. Record who supplied each file and when, plus its issuer, document number and relevant batch or company identifier. Store originals separately from translated or annotated copies. A translation helps communication but does not make the underlying document independently verified.
Assign each item to a question: who is the seller, where is production, what material is offered, what was tested and who receives payment? Request missing information deliberately. Collecting a large folder of unrelated certificates can obscure rather than resolve the decision you need to make.
Compare legal identity across the transaction
Use the Chinese legal name and registration identifier rather than relying solely on an English trading name. Compare the business licence, contracting seller and invoice issuer. Where possible, cross-check public registration information through the relevant official source and record the date and limitations. A licence copy may establish what the supplier claims about its identity; it does not prove financial strength or actual production capability.
Different office, plant and warehouse addresses may be legitimate. Ask which entity operates each site and what relationship is evidenced. Registration or a broad business scope is not proof that the company owns the machinery in a video. On-site observations and available supporting records can address a different part of that question.
Read certificates according to their scope
Separate company management-system certificates from material test documents and product-specific approvals. A management certificate does not automatically certify the steel in your order. Check the named entity, site, scope, dates, issuer and certificate identifier. If authenticity or current validity matters, contact the issuer through an independently checked public channel, not just the phone number printed in a supplier's attachment.
- Ask what lot, heat or coil a material document represents.
- Compare grade, dimensions and identifiers with the quotation and stock labels.
- Check whether values are actual reported results, typical catalogue values or a blank template.
- Identify the test method and any missing acceptance criteria.
- Keep issuer confirmation, supplier explanation and your own observation as separate evidence categories.
Follow the batch through processing and packing
Slitting, recoiling, coating or bundling can create new identifiers. Ask for the records connecting input material to finished stock. Compare available labels and packing lists during an agreed visit, and state which links could not be checked. A certificate with matching dimensions but no traceable batch connection remains incomplete evidence for the goods you intend to receive.
Do not assume photographs show your order unless the material is identified and the context supports it. Record dates, locations and whether the goods were accessible. A sample certificate can help assess the supplier's documentation process without being treated as a certificate for future production.
Treat payment details as a separate control
Compare the proposed beneficiary with the contractual chain. If a different entity receives funds, require an explanation and appropriate review by your bank or qualified adviser before payment. Reconfirm changes through a previously established, independently verified contact channel. Neither a site visit nor a document stamp guarantees that a payment instruction is safe or that money will be recoverable.
Report uncertainty explicitly
Label findings observed, supplier-stated, document-only or not verified, and explain the next action that would resolve each important gap. Commercial document review is not legal advice, certification, customs approval or a guarantee of certificate authenticity. Independent testing and issuer checks may need separate arrangements.
The illustrative report specimen shows an evidence-oriented format; it is not a client report. Send a limited, relevant document pack with your supplier verification brief, and avoid sharing unrelated personal or confidential information.
Scope and evidence limits
This is commercial due diligence, not certification or a quality guarantee. We arrange supplier visits across China, with fastest access from Tangshan. Appointments and filming permission must be agreed before attending. Unavailable evidence stays not verified; it is not silently treated as a pass.