Nobody gets into dropshipping because they love supplier due diligence. You find a product with good numbers, a supplier listing looks fine, and the temptation is to connect the store and start running ads. That is usually the moment the trouble is being set up. A supplier is not a product page, it is a business that will either deliver your customers' orders or won't, and you inherit every one of its bad weeks.
The good news is that most problems leave traces. You can spot them in an evening, before any money is at stake. Here is what to look at, roughly in the order we would do it.
1. Read the reviews that are not five stars
Five-star reviews on a supplier listing tell you very little, because they are easy to collect and sometimes easy to buy. Sort by the lowest rating and read the three-star and two-star ones. You are looking for patterns: parcels that arrive weeks late, sizes that run a full size small, items that look nothing like the photo, a seller who stops replying after payment.
One angry review is a bad day. The same complaint in six different reviews is the business.
2. Check how long they have been trading
A shop that opened four months ago and has thousands of orders deserves a closer look. It can be legitimate, but it can also be a rebrand of a shop that collected too many complaints. Look at the opening date, the order history and whether the product photos are original or lifted from other listings.
3. Message them with a real question
Do not ask "is this in stock?". Ask something that needs a thought: how the item is packed, whether they can ship with a plain invoice, what happens if a parcel is lost. Two things matter in the reply. How fast it comes, and whether a person actually read your question. A copy-pasted answer that ignores half of what you wrote is how they will treat your customers' problems too.
A reasonable benchmark is a reply within a working day. Anything past three days before you have even paid is a warning.
4. Ask about shipping honestly
Get the answers in writing for these:
- Which carriers or lines they use for your main countries, and whether tracking updates all the way to delivery.
- How long they take to hand the parcel over after an order. Processing time is where most delays hide, not the flight.
- Whether they can ship from a warehouse closer to your customers.
If you want the full picture of what to promise shoppers, our piece on shipping times from China goes into how to word it on your store.
5. Look at the return and refund terms before you need them
Suppliers rarely volunteer their return policy, so ask. Who pays for a defective item? Do they accept photos as proof, or do you have to ship the product back to China, which no customer will ever do? A supplier that refunds or reships on a photo is worth a slightly higher unit price.
6. Compare the price against the market, in both directions
A price far above the others means you are paying for nothing. A price far below deserves suspicion just as much. Cheap can mean thin materials, no quality control, or a listing that will vanish once it has collected enough payments. Put three or four similar listings side by side and note where this one sits.
7. Test the packaging expectations
Customers judge your store by what arrives at their door. Ask whether branded or neutral packaging is possible, whether the invoice shows the price you paid, and whether the box is padded. A cracked phone case or a crushed box will be your refund, not theirs.
8. Start with a small paid trial
Everything above reduces risk, but it cannot remove it. The last step is a real order, which is why we wrote a separate guide on ordering samples first. Order the product yourself, to your own address, and treat it like a customer would.
Red flags worth walking away from
- They refuse to answer questions about shipping or returns.
- The contact person changes between messages.
- They ask you to pay outside the platform to get a discount.
- Photos in the listing do not match what other buyers posted.
- Prices change after you place a test order.
Keep a simple record
A spreadsheet is enough. One row per supplier: date contacted, reply time, processing time, sample result, notes on how they handled any problem. After a few suppliers you will notice that the ones who respond quickly and clearly usually deliver the same way. And once a supplier proves itself, write down a backup too, because even good ones run out of stock. We cover that in what to do when a supplier raises prices or runs out.
Vetting will not make every order perfect. It will stop you from learning about a bad supplier from a customer, which is the most expensive way to find out.
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