A practical supplier due diligence workflow

Begin with the recorded identity

A company profile is a research lead. Capture its displayed name, location, category and the date you reviewed it. Ask the contact to identify the legal entity that will quote, contract and invoice. Company names can appear in different languages or trading styles, so resolve differences before treating separate documents as evidence about the same business. Keep the original documents and the explanation alongside your notes. An attractive profile and a prompt reply are useful for communication, but do not settle identity questions.

Understand the production arrangement

Ask which products the company makes, which operations it performs itself and which work it places elsewhere. Focus on your actual item rather than the broad category in the directory. Request an explanation of the proposed materials, processes, tooling and quality checks. If a capability claim is important, ask for evidence tied to the relevant operation. A factory photograph may show equipment, but it does not show that your product will use that equipment or that capacity is reserved for your order.

Check documents for relevance

Collect documents because they answer a defined question. For any test report, certificate or inspection record, check the named organisation, product description, version, date and scope. Ask the issuer or an appropriate specialist to resolve uncertainties when the document is material to your decision. Avoid treating an unrelated product report as proof for the item you plan to buy. Requirements depend on the product and destination; identify those requirements for your project before asking a supplier for a generic compliance statement.

Use a sample to reduce specific uncertainty

Choose a sample that reflects the proposed specification. Record what it demonstrates and what it does not. An unbranded stock sample may help evaluate shape and handling, while leaving the proposed decoration untested. A handmade development sample may not establish production consistency. Agree the checks you will perform and record results against the same criteria. Where specialist testing is needed, define the work and responsible party before relying on a visual inspection or an informal description.

Resolve the commercial details

Compare the company identity on the quotation, invoice and payment instructions. Clarify differences through an established contact channel before acting. Record the exact goods, quantity, unit, packing, delivery scope, schedule and treatment of changes or defects. Make the responsibilities visible to both parties. If an arrangement is unfamiliar or material to the project, seek appropriate professional advice. The aim of this checklist is a traceable decision, not a claim that one document or payment method eliminates every risk.

Keep an open issues list

Finish each stage by recording what is confirmed, what evidence supports it and what remains unresolved. Decide which gaps must be closed before a sample, order or shipment proceeds. Assign an owner and a next step to each important question. Revisit the record when the product, factory arrangement or contracting entity changes. Directory information can help you find candidates, but your purchasing decision should rest on current, project-specific evidence. Do not label a supplier independently audited merely because this checklist has been used.