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Supplier Verification Guide

What On-Site Factory Verification Actually Covers: A 2026 Checklist

On-site verification is not a social visit, and it is not the same as a quality inspection. It is a structured check of identity, capability and stability — and the evidence it produces is what holds up if a dispute later arises.

Junlan Verify · Updated 15 September 2026 · 7 min read

What's in this guide

  1. What on-site verification is not
  2. The seven checks
  3. How the evidence is captured
  4. What the report looks like
  5. Frequently asked questions

1. What on-site verification is not

Buyers often confuse three different things: a factory tour, a quality inspection and a factory verification. A tour shows you around. An inspection checks whether a finished batch meets your specifications. A verification verifies that the supplier is capable of making what it promises, that it is the legal entity it claims to be, and that its operations are stable enough to rely on.

The difference matters because a building with machines in it is not enough. What matters is whether the entity on your contract owns or controls that building, whether the workforce and equipment can deliver your order, and whether the evidence is documented in a way that survives a later dispute. A proper verification answers those questions; a video call does not.

2. The seven checks

A structured verification covers seven areas. Each one produces a documented finding rather than an impression.

1. Legal structure and identity

The verificationor confirms that the legal entity on site matches the entity on the contract, the invoice and the business licence. This includes checking the unified social credit code, the company seal, and whether the people signing documents are authorised to do so.

2. Registered vs operating address

The verificationor verifies that the factory you are shown is tied to the registered entity, not a borrowed or third-party site. Address mismatches are one of the most common ways a trading company disguises itself as a manufacturer.

3. Capacity and equipment

The verificationor records the production lines, key equipment, and approximate capacity in relation to your order volume. The goal is to answer a simple question: can this facility realistically produce what it is promising in the agreed time frame?

4. Workforce size and stability

The number of workers on the floor, the skill mix, and signs of stability or high turnover are documented. A facility with far fewer workers than its claimed output would suggest subcontracting or overstatement.

5. Production workflow

The verificationor follows the process from raw material intake through production steps to finished goods and packing, noting whether the workflow matches the product you are buying. Inconsistent or absent workflow documentation is a finding in itself.

6. Quality-control system

The verificationor reviews incoming material checks, in-process inspections, final inspection records, and any claimed certifications. A real QC system leaves paper trails; a weak one relies on memory and goodwill.

7. Product verification

Where possible, the verificationor compares the product being made or stored with your specifications, samples or approved references. Photographic evidence is tied to the visit date and the specific company.

3. How the evidence is captured

A professional verification produces an evidence chain rather than a narrative. That means dated photographs of the site and equipment, copies of relevant licences and certifications, interview notes with management and floor staff, and a record of what was observed and what was not accessible. Each piece of evidence is tied to the specific legal entity, so the findings can be used later if the relationship sours.

Where the evidence may need to be used abroad, a notarised attestation can be added as an optional add-on, quoted separately. It costs significantly more, because a notary must attend in person under a special statutory procedure. In Apostille member states, an Apostille removes the need for consular legalisation — but the receiving authority may still review the content of the document under its own law. It is worth doing in three situations only: the evidence has to stand up outside China, a dispute is foreseeable, or the buyer's bank or lawyer asks for it.

4. What the report looks like

The final report is typically a bilingual document with a clear executive summary, a status for each of the seven checks, supporting photographs and documents, and a risk assessment. Instead of a pass/fail grade, a good report tells you what was verified, what could not be verified, and what risks remain.

That structure matters for decision-making. If the verification confirms a real factory with matching capacity and a stable workforce, you have a documented basis to proceed. If it finds that the operating entity is different from the contracting entity, or that capacity is far below claims, you have evidence to renegotiate or walk away before paying.

5. Frequently asked questions

Is on-site verification the same as a quality inspection?
No. A quality inspection checks whether a finished batch meets specifications. A factory verification checks whether the supplier is capable of making what it promises, whether it is the entity it claims to be, and whether its operations are stable. You can think of the verification as confirming the factory's identity and capability; the inspection verifies the goods.
Can I trust a video factory tour instead of a verification visit?
A video tour confirms that a production site exists somewhere, not that your counterparty owns, controls or operates it. Trading companies and intermediaries routinely borrow a partner's floor for a scheduled filming. An in-person verification visit ties the site, the equipment and the workforce to the specific legal entity on the contract and produces dated, documented evidence.
How long does on-site verification take?
The on-site visit is usually one working day. Including travel, reporting and verification, most verification visits are delivered within three to seven days, depending on the location and the size of the facility.
What documents should I request before the visit?
At minimum: the business licence, any export or product licences, a factory layout or floor plan, recent utility bills, a workforce overview and any quality-control certifications they claim to hold. These documents set the baseline that the verificationor will verify on site.
Does on-site verification guarantee product quality?
No. A verification reduces the risk of dealing with the wrong entity or an incapable facility, but it does not guarantee that the specific batch you receive will be perfect. For quality assurance, combine a verification with pre-shipment inspections and clear, written specifications and acceptance criteria.
When should I upgrade to a notarised verification?
When a deal additionally needs a notarial seal — high-value contracts, long-term relationships, or evidence that may later be used in a foreign court or arbitration. It is an optional channel, not part of the standard service: a licensed notary attends in person under a special statutory procedure, so it costs significantly more and takes longer. A notarised verification is witnessed and sealed by a licensed notary, and an Apostille can be added for recognition in Hague Convention member countries. The underlying evidence — real-time photos and videos carrying GPS, timestamp and hash — is already preserved without it.

Need boots on the ground?

Junlan Verify's on-site verification covers legal structure, capacity, equipment, workforce, workflow and product verification — with documented evidence tied to your supplier.

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