How to Verify a Wholesale Supplier: Due Diligence Checklist

Verification is most useful before money moves. Start with the checks that take minutes, record what you found, and decide whether the value and risk of the order justify deeper checks.

The sequence helps you avoid paying for a facility visit when the identity or payment information still needs explanation.

Download the supplier verification checklist. Use it to record the source, date checked, evidence, and decision for each item rather than relying on a collection of screenshots.

1. Legal registration

Confirm the company in the official business registry for the jurisdiction it claims. Compare the legal name, registration number, status, and address with the quotation and proforma invoice.

What you are looking for:

• The entity exists and is active, not dissolved or suspended
• The name matches the one on the quotation and the proforma invoice
• The incorporation date is consistent with the trading history claimed
• The registered address is consistent with the business information you have been given

A trading name can differ from the registered entity. Ask the supplier to document the relationship, then record the legal entity that will sign and invoice the transaction.

2. Bank account name

Compare the account holder named in payment instructions with the legal entity on the quotation and invoice. A difference is not automatically fraud: a group company, payment agent, or trading name may be involved. Ask for written documentation and independently confirm it before payment.

Variations worth stopping over:

• Payment requested to a personal account
• Payment to a third-party company described as an agent or affiliate
• An account in a different jurisdiction from the registered entity, without explanation
• Banking details changed by email partway through a transaction, which is a common compromise pattern rather than an administrative update

For a payment-detail change received by email, call a previously verified number or use a known portal. Do not use the contact information included only in the change message.

3. Trading and export history

When available and legally accessible, shipment records can help test a supplier’s claims about product category, volume, or markets served. Their absence is not proof that no trade occurred: sales can move through intermediaries or be outside the available data.

What it establishes:

• Whether they ship the product category at all
• Whether volumes are consistent with the capacity described
• Whether the trade is recent or historical
• Which markets they already serve, which tells you about certification experience

A supplier claiming years of exports to your market with no visible record is worth a direct question. Record the explanation and seek supporting evidence that is appropriate to the order.

4. Physical verification

Either visit, or commission an audit from a firm you selected. A report supplied by the supplier can be useful evidence, but confirm its issuer, date, scope, and whether it covers the facility and product you are considering.

A useful audit covers:

• That production for your product category actually happens on site
• Capacity consistent with the volumes discussed
• Quality control processes that exist in practice, not only on a wall chart
• Whether the business owns the line or is subcontracting

Where an audit is disproportionate to the order value, a directed video call can provide an additional check. It does not verify every aspect of capacity, compliance, or quality.

5. Certification for your destination market

Confirm certification covers the market you are selling into and the exact model you are buying.

Two failure modes recur, and both involve genuine documents:

• Right document, wrong market. Certified for a region you are not selling in.
• Right document, wrong variant. Model number one character different from yours.

Check against the model number on the proforma invoice rather than the catalogue page. Compliance obligations attach to the importer of record and generally do not transfer by private agreement — see Basics of importing and exporting.

Where product compliance review fits

Steps 1 to 4 check the company. Product compliance checks the goods against the rules of the market you sell into, and it runs as a separate track: start it as soon as you have a model number and a destination market, and finish it before the deposit, because a product that cannot be certified for your market is not worth a factory visit.

For consumer products imported into the United States, the U.S. Consumer Product Safety Commission (CPSC) describes two certificates:

• Children’s products (designed or intended primarily for children 12 or younger) that are subject to a children’s product safety rule need third-party testing. The domestic manufacturer or importer certifies compliance in a written Children’s Product Certificate, based on results from a CPSC-accepted laboratory.
• General-use products that are subject to a CPSC-enforced rule, ban, standard or regulation need a written General Certificate of Conformity, based on testing or a reasonable testing program, and it must be in English.

In both cases the CPSC names the domestic manufacturer or the importer as the party that certifies. A test report from an overseas supplier is evidence you can use, not a certificate issued on your behalf. CPSC guidance also states that, beginning July 8, 2026, importers of most regulated consumer products must electronically file certificates of compliance with U.S. Customs and Border Protection. Check the current CPSC guidance for your product before you rely on a supplier’s paperwork.

Which rules apply depends on the product category. Other agencies regulate other categories, and other countries have their own regimes, so this page does not list requirements by product. Category guides under industries cover the questions specific to each category.

What to collect from the supplier during this track:

• The test report, with the laboratory name, report date, and the standard or rule tested against
• A model number that matches the proforma invoice and the sample, not a related variant
• The scope of the report: which components, colours or sizes it covers
• Who will certify: if you are the importer, the certificate is yours to issue, so decide now whether the supplier’s evidence is enough or whether you need your own testing

Marketplaces can ask sellers for their own documents in addition to legal requirements. Check the current seller policy of each platform you list on and add any document it asks for as an extra row in the checklist.

Evidence to record

For each check, record the source URL or document reference, the date checked, the legal entity or model it relates to, what you found, and the decision it supports. Keep the original quotation, proforma invoice, payment instructions, samples, certificates, and audit scope together with that record. The supplier verification checklist includes these fields and a status for items that need follow-up.

A filled-in example

The example below shows how a completed checklist reads, using the rows and decision options (Pending, Continue, Stop, Escalate) of the downloadable file. The supplier, files and findings are illustrative, not a real case. What matters is the pattern: every row names its evidence, and every row that is not Continue has a next action.

Check	Evidence recorded	Finding	Decision	Next action
Legal registration exists and is active	Registry record, saved as PDF with the date checked	Active	Continue	None
Quote legal name matches registration	Quotation and registry record side by side	Names match	Continue	None
Bank account name matches the legal entity or has a documented explanation	Payment block on the proforma invoice	Account held by a related trading company	Pending	Ask for a written explanation of the relationship
Changed payment details verified through a known contact channel	Call log to the number already on file	No change received so far	Continue	Re-check if details change
Trading history supports the claimed product category and markets	Shipment-record search notes	Category and markets consistent with claims	Continue	None
Facility visit or independently commissioned audit reviewed	Report from an audit firm you selected	Production for this category seen on site	Continue	Keep the report scope with the record
Certification matches the exact model and destination market	Supplier test report	Report cites a different model suffix	Stop	Request a report for the exact model, or plan your own testing
Sample, specification, inspection point, and remedy agreed separately	Signed specification; sealed sample	Inspection point not yet agreed	Pending	Agree pre-shipment inspection before production

In this example the deposit waits: one row is Stop and two are Pending. Change a decision only when new evidence is attached, and keep the earlier entry rather than overwriting it.

What verification does not cover

Verification establishes the counterparty. It says nothing about the goods.

A well-registered, audited, long-trading factory can still ship product that does not match your specification. Those are separate controls: a written specification, an approved and retained sample, and a pre-shipment inspection standard agreed before production starts. That sequence is in ecommerce sourcing.

It also says nothing about which role the business occupies. A verified trading company is still a trading company, and pricing a deal on factory-direct assumptions will still be wrong — see manufacturer vs wholesaler vs distributor.

When to re-verify

Treat verification as a record that may need updating. Re-run the relevant checks when:

• Banking details change, for any reason
• The legal entity on the invoice changes
• Your main contact changes and the new one is unfamiliar with prior terms
• Capacity suddenly increases beyond what the audit supported
• You have not ordered for a long enough period that the business may have changed hands

Where to go next

For where verification sits in the wider selection process, see wholesale suppliers. For finding candidates to verify in the first place, see how to find wholesale suppliers. For distributors specifically, where authorisation is an additional question, see how to evaluate a wholesale distributor.