Most supplier-vetting advice tells you how to think about verification. This is the other thing — the working document you keep open while screening, with numbered checks you tick off, flags that stop you cold, and a rule about when you’re allowed to spend money. Print it, copy it, run every supplier through it.
Screen baby monitor suppliers with 40 checks across five stages, gated so you never spend money before the previous stage clears: Stage 1 — identity and legitimacy (8 checks, desk research, free): business licence scope covering manufacturing, factory address that looks like a factory, focused product range. Stage 2 — capability and engineering (8 checks, first calls): own PCBA design, the engineer on video, direct answers to technical questions. Stage 3 — documentation (9 checks, before any deposit): DoC and full test reports for the exact model, standards matched, lab verified. Stage 4 — systems and production (8 checks, video walkthrough): traceability shown live with date-specific proof, change history demonstrated, production-batch samples. Stage 5 — order protection (7 checks, written into the PO): AQL specified, third-party inspection agreed, change control in writing. Twelve red flags disqualify a supplier regardless of how many checks pass — the clearest being certificates in a different company name, test reports for a “similar model,” and refusal of live video or third-party inspection. Critical checks are marked MUST: a failed MUST stops the process rather than lowering a score.
This page is the tool, not an article about the tool. Work top to bottom, one supplier at a time. Each stage costs more than the last — in time, then in sample fees, then in deposit — so the gate rule at the end of each stage exists to stop you paying for stage N+1 while stage N is unresolved.
Checks marked MUST are dealbreakers: a failed MUST isn’t a lower score, it’s a stop. Everything else is a judgment call you record and weigh. There is deliberately no total score — a supplier that passes 38 of 40 but fails one MUST is not a 95% supplier, they’re a no.
§01Why a gated checklist beats a scored one
The instinct with any vetting list is to total it up: 34 out of 40, better than the other guy’s 31, done. That’s a comfortable way to make a decision and a poor way to make this one, because the checks aren’t equivalent. “Answers emails within 24 hours” and “certificates are in a different company name” both look like one line on a list. One is a preference; the other means the paperwork you’d rely on doesn’t belong to the company you’d be buying from.
So this checklist works as gates rather than points. Stages run in order because their costs run in order — desk research is free, calls are cheap, samples cost money, deposits cost more. Each gate exists to make sure you fail cheaply, before the next commitment. And a supplier that hits a red flag doesn’t get averaged out by the checks they passed; they stop.
FIG.01 — The screening funnel. Cost rises as the funnel narrows, which is the point: the free stages do the heavy elimination, so the expensive stages only run on candidates who’ve already earned them. A supplier reaching Stage 5 has passed 33 checks and 12 red-flag tests.
§02The 40 checks
- Business licence received, and its scope includes manufacturing or production — not solely trade or import/export.MUST
- Company name on the licence matches the name on the website, quotations, and email domain.MUST
- Both a registered address and a factory address provided, and they’re stated separately rather than conflated.
- Factory address checked on maps: it resolves to an industrial area or production facility, not an office tower or residential block.
- Years in operation stated, and consistent across the website, licence, and any platform profiles.
- Product range is focused on monitors and related electronics — not a broad, mixed catalogue spanning unrelated categories.
- Company email uses their own domain rather than only a free mail service.
- Presence is consistent across independent sources: own site, B2B platform profiles, directories — same name, same address, same claims.
GATE 1 — both MUSTs clear and no red flags before you spend more than an email on them. Roughly half of a raw supplier list ends here, at zero cost.
- Confirmed they design their own PCBA rather than buying in a finished board from a third party.MUST
- The engineer who owns the design is made available on a video call.MUST
- Technical questions are answered directly in the conversation, not deferred with “I will check with the factory.”
- They name specific trade-offs in their own platform unprompted — a sign of engineering ownership rather than sales scripting.
- Firmware is developed in-house or by a named partner, and the update mechanism is explained concretely.
- Customisation depth stated specifically: what can change (UI, casing, packaging, tooling) and what can’t.
- MOQ given per customisation level rather than as a single headline number.
- They ask you questions about your market, channel, and intended claims — a real partner qualifies you too.
GATE 2 — both MUSTs clear before you pay for samples. If the engineer never materialises after two attempts, treat it as failed rather than pending.
- Declaration of Conformity provided for the exact model number you intend to buy.MUST
- Full multi-page test reports provided — not certificate cover pages alone.MUST
- Model number matches across the DoC, the test reports, the quotation, and the physical sample.MUST
- Standards and directives listed on the DoC match those actually tested in the reports.
- Test report dates checked against the current hardware and firmware version — no reports predating a known design change.
- The named test laboratory exists, is findable independently, and the report format matches its genuine output.
- Company name on certificates and reports matches the business licence from check 01.MUST
- Existence of the technical file confirmed in writing, with a commitment to make it available on request.
- Battery transport documentation (UN 38.3) provided for any lithium cells.
GATE 3 — all four MUSTs clear before a deposit moves. This is the stage where “similar model” paperwork surfaces — see the document cross-examination method for how to read each field.
- A live video walkthrough is agreed — interactive and in real time, not a pre-recorded promotional film.MUST
- Date-specific proof during the tour: today’s date on a whiteboard or screen, and the operator responds to your live requests (pan here, zoom there) so the footage can’t be from last year.
- A batch or serial identifier shown on an actual finished unit, on camera.
- That identifier traced backwards on camera to production records — date, line, and test results for the run.MUST
- The functional test station shown on the line, with an explanation of what’s recorded per unit or per batch.
- A past component change walked through: how it was recorded, who approved it, and how customers were notified.
- Label and marking artwork provided as editable files, with designated space for your brand and importer details.
- Samples confirmed to come from a normal production batch rather than hand-tuned demonstration units.MUST
GATE 4 — all three MUSTs clear before mass production is authorised. A factory whose systems are daily reality walks the camera without preparation time; one that needs three days to “arrange” it is arranging something.
- An AQL standard is specified in the purchase order, making acceptable quality a measurable contractual term.MUST
- Third-party pre-shipment inspection agreed in principle, with the scope written down.MUST
- Inspection scope includes markings, labels, and documentation — not function alone.
- Written change-control commitment: no component or board substitution between batches without prior written notice.MUST
- Payment terms staged, with the balance tied to a satisfactory inspection result rather than to shipment alone.
- Warranty terms and expected defect rate stated in writing, including who bears replacement freight.
- Spare-parts and replacement-unit availability confirmed, including a standalone camera SKU if your channel needs one.
GATE 5 — all three MUSTs written into the PO before the deposit. Terms agreed verbally at this stage have a way of not surviving the reorder.
§03The 12 red flags
These override the checklist. A supplier can pass thirty-something checks and still be disqualified by any one of these, because each indicates something structural rather than a gap you can fill in:
- Certificates or test reports carry a different company name than the business licence. The paperwork you’d rely on doesn’t belong to the company you’d be buying from.
- Test reports cover a “similar model.” Documents for a cousin product tell you nothing about yours — and the cousin is often the version with different internals.
- Only certificate covers are offered, with the underlying reports described as unnecessary or unavailable.
- The business licence or factory address is withheld, deflected, or arrives only after repeated asking.
- A broad, unrelated product catalogue spanning categories no single factory would tool for — the classic trading-company signature.
- The engineer never appears. Every technical question is relayed to an unnamed “factory,” which usually means the factory is someone else.
- “No problem” to everything, including questions that have real trade-offs. A supplier who never says “that’s difficult, and here’s why” isn’t reading your requirements.
- Live video is refused and replaced with a promotional video or still photos of unclear age.
- Third-party inspection is resisted — “not necessary, we test everything ourselves.” Confident factories welcome independent eyes.
- Written change control is refused or endlessly deferred. Verbal assurances protect batch one and nothing after it.
- An unusually low MOQ paired with one-stop-shop behaviour — any product, any quantity, any customisation, immediately. That’s a reseller’s answer, not a factory’s.
- A price far below every other quote, with no explanation of what’s different. Cheapness always has a reason; a supplier who can’t name theirs either doesn’t know or won’t say. The full argument on why cheapest is the wrong question.
§04The decision rule
What to do with the results, stated so there’s no ambiguity when a supplier is charming and you want to say yes:
- Any red flag → stop. Not “note and continue” — resolve it fully, in writing, or end the conversation. Red flags don’t average out against passed checks.
- Any failed MUST → stop at that gate. A failed MUST is a structural problem, not a scoring deduction. Thirty-eight of forty with one MUST failed is a no.
- Stages run in order. Don’t pay sample fees before Gate 2, don’t send a deposit before Gate 3, don’t authorise production before Gate 4, don’t pay anything before Gate 5 terms are written.
- Record answers, not impressions. Write down what was said, by whom, on what date. Six weeks and four suppliers later, memory blurs and confident people sound alike.
- Run it on three or more suppliers. The checklist’s real value is comparative: the same forty questions expose differences that individual conversations conceal.
- Re-run Stages 3–5 on reorders. Verification is per-batch, not per-relationship. Documents expire, components change, and check 37 exists precisely because batch two is where quiet substitutions appear.
§05What this checklist doesn’t cover
Two honest limits, so you don’t over-trust the instrument. First, it verifies a supplier, not a product. A factory can pass all forty checks and still build a monitor with mediocre night vision — sample testing against a written specification is a separate exercise, covered in the sample-testing protocol. If your product hinges on a specific architectural claim, that needs its own verification too: confirming a “no WiFi” claim is hardware-based is not something a general supplier check will surface.
Second, it’s a screening tool, not a compliance opinion. Checks 17–25 tell you whether documentation is coherent and belongs to the company you’re buying from — not whether your product meets every requirement of your target market. That determination belongs to qualified compliance professionals, and the regulatory picture for the EU specifically is in our EU import guide and GPSR guide. Passing this checklist means a supplier is worth proceeding with — not that your compliance work is finished.
§06Frequently asked questions
What should a baby monitor supplier verification checklist include?
Five stages, gated by cost. Stage 1, identity: business licence with manufacturing scope, matching company name, factory address that resolves to an industrial site, focused product range. Stage 2, capability: own PCBA design, the engineer available on video, direct technical answers. Stage 3, documentation: DoC and full test reports for the exact model, standards matched, laboratory verified, certificate name matching the licence. Stage 4, systems: live walkthrough with date-specific proof, traceability demonstrated, production-batch samples. Stage 5, order protection: AQL in the PO, third-party inspection agreed, written change control. Plus red flags that disqualify regardless of how many checks pass.
What are the biggest red flags when vetting a Chinese manufacturer?
Twelve, with three standing out. Certificates carrying a different company name than the business licence means the paperwork doesn’t belong to your counterparty. Test reports for a “similar model” tell you nothing about the product you’re buying. And refusal of live video or third-party inspection is a supplier declining to be verified — the single most informative response you can get. Others include a broad unrelated catalogue, an engineer who never appears, “no problem” answers to questions with real trade-offs, refusal of written change control, and a price far below every other quote with no explanation of what’s different.
How do I verify a factory’s traceability remotely?
Ask to be shown rather than told, on a live call. Have them point the camera at a finished unit and show the batch or serial identifier; then take that identifier and trace it backwards on camera to the production records — date, line, test results for that run. Ask for date-specific proof during the tour: today’s date on a whiteboard, and the operator responding to your live instructions to pan or zoom, so the footage can’t be from last year. A factory with real systems does this without preparation time.
Should I score suppliers or use pass/fail gates?
Gates. Scoring implies the checks are equivalent, and they aren’t — “responds within 24 hours” and “certificates are in a different company name” occupy one line each but mean entirely different things. A gated checklist marks critical items as MUST: a failed MUST stops the process rather than deducting points, so a supplier passing 38 of 40 with one MUST failed is a no, not a 95%. Gates also order the stages by cost, so you fail cheaply — free desk research eliminates candidates before you pay for samples.
When should I stop talking to a supplier?
Immediately on any red flag, unless it’s fully resolved in writing. Also at any failed MUST check, at the gate where it failed. The practical discipline is that these stops happen at defined moments rather than when frustration accumulates — which matters because suppliers who fail structural checks are often pleasant and responsive, and pleasantness is not evidence. Record what was said and when; after four suppliers and six weeks, confident people sound alike in memory.
Do I need to re-verify a supplier on reorders?
Yes, for Stages 3 to 5. Verification is per-batch rather than per-relationship: documentation can expire or be superseded, hardware and components can change, and the second production run is where quiet substitutions typically appear. Re-confirm that documents still cover the current model, that the change-control commitment has been honoured, and keep AQL and inspection in the reorder PO. A first batch that passed everything tells you about that batch.
Can True Bond pass this checklist?
That’s the intended use — run it on us. True Bond designs its own PCBA and firmware with engineers available on video calls, issues documentation against the exact model with full test reports behind certificates, demonstrates batch-level traceability on live walkthroughs, ships production-batch samples, supports AQL terms in the purchase order, and commits to written change control against silent substitution. The checklist is published because a supplier confident in these answers benefits from buyers who ask the questions.
Run all 40 on us
Business licence, engineer on video, reports for the exact model, live traceability walkthrough, AQL and change control in writing. Send your market and volume, and start at check 01 — we published the list because we’d rather be measured against it than trusted without it.
Start at check 01 → info@truebondtech.com · WhatsApp +86 189 2846 4489 · View productsThe verification toolkit