How to vet a Chinese fulfillment supplier before you commit

A checklist of the things that matter, the things that do not, and the questions that separate real operators from ticket-desk agents.

Why vetting matters more than people think

Most dropshippers treat supplier selection like picking a shipping plugin. They compare per-order prices, look at a few screenshots, exchange a handful of WhatsApp messages, and commit. Then they spend the next three months discovering what was missing from that conversation.

Here is the honest math. A bad supplier does not just cost you refunds. It kills your ad account. If your return rate spikes to 25 percent because the sizing is off, your Shopify payments hold starts growing. If your chargeback rate crosses 1 percent because packages are late or damaged, Stripe or PayPal will freeze you. If a supplier ghosts you for a week during a sale, your Meta Ads pixel learns the wrong audience. None of those costs show up on the supplier's invoice, but they all land on your P and L.

We run a fashion fulfillment service ourselves, and we started it because we kept getting burned by suppliers who looked fine on the first call. Here is what we wish someone had told us. Steal any of it that helps, even if you end up working with someone other than us.

The ten questions to ask on the first call

Most of this list is not about pricing. Pricing is the last conversation, not the first. If you ask only about price, you will end up paying for everything else later.

• Do you own the warehouse, or are you subcontracting to one? Who actually touches my inventory?
• What are your payment terms, and do you hold inventory against prepayment or against orders shipped?
• What is your QC methodology per order, and what does the checklist look like on paper?
• What is your typical SLA from order placed to tracking uploaded, and what is your standard for delayed orders?
• How do you handle disputes between me and the end customer when the evidence is ambiguous?
• What languages do you support in written communication, and who answers when your main contact is asleep?
• Can you share two or three current clients I can reach on my own, not testimonials you choose?
• What does exiting look like if we stop working together? Who owns the inventory, the data, the branded materials?
• What is your sample policy, cost, and turnaround before I commit to any volume?
• What are your working hours, which timezone, and when is nobody available?

If your prospective supplier gets visibly uncomfortable at more than one of these, that is already a signal. A real operator expects these questions because they ask them of their own factories.

Red flags you should take seriously

None of these are dealbreakers alone. Two or more in combination usually mean you are going to regret it.

• WhatsApp-only communication with no email domain that matches a company name. If their business cannot produce an @company.com email, there is no company.
• No written sample policy. Every serious supplier has a standard process for sample requests with a price, a lead time, and a clear scope.
• Pricing that feels noticeably below what similar suppliers quote. Fulfillment is a thin-margin business. Anyone undercutting the market is either subsidizing to win you, running something unsustainable, or quietly cutting QC.
• Ownership that stays vague through multiple conversations. You should eventually know the legal entity and who signs the contracts. If that question keeps sliding, something is off.
• No past-client references they are willing to connect you to. Screenshots of WeChat conversations are not references.
• Slow or vague responses to technical questions about shipping lines, customs, or returns handling. A supplier who runs real volume has these answers ready.
• Promises that sound too flexible. If everything is possible and no tradeoffs are ever mentioned, they are telling you what you want to hear, not how their operation actually works.

Green flags that are worth weighting heavily

These are the signals that correlate with suppliers who are still around in two years.

• Willingness to send samples with a full QC documentation sheet. Weight measured, material described, stitching photographed, size measurements verified against the listing. If a supplier volunteers this paperwork without being asked, they run this process every day.
• Disclosed ownership and a real address. Ideally a company name you can search, a business registration you can verify, and a location you can find on a map.
• Video warehouse tour. Not a staged marketing video. An unscripted walkthrough where you can see the actual operation, the packaging station, the QC area, and the staff.
• Written process documents. SOPs for receiving, QC, packing, and exception handling. You do not need these to be polished. You need them to exist.
• Willingness to start small. A good supplier would rather do a 50-order test than a 5000-order leap of faith. If they are pushing for volume before you are ready, ask why.

The sample test: actually stress-test them before scale

The first shipment of samples is not a test. It is a sales presentation. Every supplier puts their best work into the sample box. The real test happens on orders 5 through 50.

Here is a test protocol that has worked for us when we were vetting suppliers ourselves.

Step 1. Run 5 to 10 real customer orders through them, at normal volume, to normal addresses in your target markets. Do not tell the supplier these are test orders. You are sampling their default process, not their best effort.

Step 2. Deliberately include one order with a real problem. A wrong size request, a last-minute address change, a damaged-on-arrival claim. Watch how they handle it. A supplier who responds fast, takes ownership, and offers a fix without blaming the customer is worth keeping. A supplier who routes you through tickets and asks for photo evidence three times is showing you what scaling with them will look like.

Step 3. Check timing consistency. If your SLA is 48 hours from order to tracking, measure every single order. One or two outliers are normal. A pattern of slippage is a trend.

Step 4. Open one or two packages yourself. Check that the QC checklist the supplier promised actually happened. Measure the garment. Compare to the size chart. Look at the stitching, the labels, the packaging. If any of it does not match what they promised, you caught it now instead of at 500 orders a day.

Reference checks: the questions most people skip

If a supplier gives you references, use them properly. Do not ask whether the client likes them. Everyone likes their supplier until they do not.

Ask these instead.

• What goes wrong most often, and how does the supplier handle it when it does?
• How long did the relationship take to stabilize? What did the first month feel like versus the sixth?
• What have you tried to change or customize, and how did the supplier respond?
• Have you had a dispute or a real problem with them? What was the resolution?
• If you were starting over tomorrow, would you sign with them again?

The last question is the most important. It is phrased as a decision, not an opinion, and people answer it more honestly than you would expect. If the reference hesitates, thank them for their time and ask a follow up. The pause is the data.

Pricing tells: what is inside the per-order cost

Every fulfillment quote is a bundle. The per-order number is meaningful only when you know what is bundled in and what is going to appear as an upcharge later.

Things to explicitly ask about before you sign anything.

• Packaging. Is the default polybag branded or generic? Is a custom mailer included, optional, or an upcharge? What about hangtags, thank-you cards, inserts?
• QC level. Is every order checked, or is QC a sampled process? Is there a premium tier with stricter QC? What exactly is checked on each garment?
• Photography. Do you get photo proof per order, per batch, or on request? Photo proof is load-bearing for chargeback defense.
• Shipping line. Is the quoted rate based on a specific line and service level? What happens when that line has delays or capacity issues?
• Returns. Who pays for the return leg when a customer returns a product? Is there a restocking process, and is it included or extra?
• Remakes and replacements. Who eats the cost when an order ships wrong? What percentage of remakes are on the supplier versus on you?

Suppliers who quote a low headline price and then list ten upcharges are not necessarily dishonest. They are just running a different business model than the one that looked cheap on page one. You want to know that before you sign, not after.

Exit costs: what happens when it stops working

Every supplier relationship ends. Either your business outgrows them, they outgrow you, or something breaks. The question worth asking on day one is how bad the exit looks.

• Inventory. If you have prepaid or pre-shipped inventory sitting in their warehouse, how do you get it out? Who pays for the outbound logistics?
• Branded materials. Hangtags, polybags, mailers, inserts. These are yours, but they are sitting in their warehouse. Is there a written process for returning or disposing of them?
• Data. Your order history, tracking records, customer info. Can you export it in a usable format?
• Open orders. If you notify them you are leaving, do they finish fulfilling open orders or stop cold?
• Notice period. Is there a contractual notice period? Is it reasonable?

A supplier who has never thought about exits is either new or hoping you will not think about it either. A supplier with written answers has seen relationships end before, which is actually a good sign.

The soft signals that usually tell the real story

After you have run through the checklist, the gut call still matters. Here is what we watch for.

Response time. Not just in the sales conversation, but at 9 pm your time on a Sunday. If the supplier answers fast when they want your business and slowly once you have signed, that pattern was there to see in week one if you paid attention.

Language precision. In a second language, precise English signals somebody who works through detail carefully. Vague answers to specific questions are almost never a language problem. They are a process problem.

Willingness to say no. A supplier who agrees to everything is either lying or about to fail you on the thing they should have pushed back on. A supplier who says 'that is not how our warehouse works, here is what we can actually do' is the one you want.

Consistency across channels. If the person on the sales call, the WhatsApp contact, and the person who confirms orders are three different people with three different levels of detail, you are going to end up playing telephone every time something goes wrong.

Putting it together

Vetting a fulfillment partner is not about finding the perfect supplier. Perfect does not exist at this price point. It is about finding the supplier whose weaknesses you can live with, whose strengths you actually need, and whose process you understand before you commit real money to it.

If you run through the ten questions, trust the red flags when you see two in combination, lean on the sample test over the sales pitch, check references properly, and know what exit looks like on day one, you will avoid the worst mistakes. That alone is worth more than any one supplier choice.

If you want to hold us to this same standard, we expect it. If you choose someone else who passes this test, you are in better shape than most of the market.

Frequently asked questions