Practical Answer — Supplier Control
Can My Factory Sell the Same Product Through Another Company?
Last updated: June 2026
It depends on what your agreement says — and what IP you have registered. Without express restrictions, a factory may argue it is free to produce and sell independently.
In short
Whether a Chinese factory can produce or sell your product through another company depends on what your contract says. Without an exclusivity clause, non-use restrictions, production limits, and IP registration, the factory may argue it is free to manufacture and sell similar products independently. Overrun units, affiliated companies, and online platform sales are the most common channels. The protection structure needs to be in the agreement before production starts.
The Direct Answer
Whether a factory can legally do this depends on what the agreement says — and what IP is registered. Without clear exclusivity, production limits, non-use restrictions, and IP registrations, the factory may have significant freedom to manufacture and sell independently. The answer is fact-specific and depends on the specific terms and registered rights in each situation.
What the Factory May Argue
In the absence of express contract terms or IP registrations covering the product, a Chinese factory may take the position that:
- The purchase agreement only covers the specific order placed — not an exclusive manufacturing arrangement
- The product design is a standard category item, and the factory was manufacturing similar products before the relationship began
- The tooling and product files used for production belong to the factory as the developer or manufacturer
- No trademark or patent registered by the buyer applies to the product as the factory produces it
- Selling excess units through another channel does not breach any agreement in place
Overrun Units and Parallel Production
Two related but distinct risks often affect product founders manufacturing in China:
Overrun units
The factory produces more units than the buyer ordered and sells the surplus through distributors, online marketplaces, or affiliated companies. Without a production limit clause, the factory may argue there is no restriction on how many units it may produce in a run — and that surplus units are its to sell.
Parallel production
The factory manufactures the same or substantially similar product for other buyers or its own brand using the customer's tooling, files, or design specifications. Without exclusivity and non-use provisions, the factory may argue it is free to use its manufacturing knowledge and capabilities for similar products.
Affiliated company sales
The factory does not sell directly but routes sales through a related company, online store, or affiliated trading company. This makes it harder to establish that the original manufacturer is responsible, especially if the products are sold under a different brand or with minor modifications.
Contract Terms That Reduce Side Sales Risk
The following terms should be expressly addressed in a manufacturing agreement — not implied:
- Exclusivity — the factory may only manufacture the product for the buyer
- Production limits — the factory may not produce more units per run than ordered
- Non-use restriction — the factory may not use the product design, tooling, molds, or files for any other customer, product, or purpose
- Non-competition clause — the factory may not manufacture or sell substantially similar products in specified markets
- IP filing restriction — the factory may not register any trademark, patent, or design right based on the buyer's product
- Tooling and file ownership — these belong to the buyer, and the factory may not use them for any other purpose
IP Registration as a Protection Layer
Even with strong contract terms, IP registration provides an additional layer of protection that can be enforced without relying solely on contract claims:
- China trademark — protects the brand name and logo against unauthorized use on similar products
- China design patent — may protect the ornamental appearance of a product against substantially similar designs
- China invention patent or utility model — may protect functional features of the product
IP registration is most effective when done before the factory has the product — not after side sales are discovered. For trademark specifically, the relevant consideration is whether to file before factory engagement. See: Should I File a Trademark in China Before Contacting Factories?
Get Help
Review Your Supplier Protection Structure
A Supplier Control Review covers your manufacturing agreement, exclusivity terms, production limits, non-use restrictions, and IP registration layer — and identifies where side sales risk is highest.
Frequently Asked Questions
Can a Chinese factory legally make and sell my product through another company?
Whether a factory can do so depends on what your agreement says. Without an exclusivity clause, a non-use restriction, IP registration covering the product, or express limits on the factory's right to produce similar goods, the factory may argue it is free to manufacture and sell a similar product independently. What exactly the factory can or cannot do depends on the specific contract terms, the IP registered, and the facts of each situation.
What are overrun units and why do they matter?
Overrun units are production units made by the factory beyond the quantity ordered by the buyer. In practice, many factories produce more units than ordered — and may sell the extras through distributors, online platforms, or affiliated companies. Without an express prohibition on overrun production and a limit on the quantities the factory may manufacture per run, the factory may have no contractual obligation to limit output.
Does having a trademark stop the factory from selling my product?
A China trademark registration covering the brand name and logo is a meaningful layer of protection. If the factory tries to sell products under your registered brand, trademark enforcement becomes available. However, the factory may sell similar products under a different brand, or sell products with no brand applied. Trademark protection addresses the brand layer — it does not by itself prohibit the factory from manufacturing and selling a similar product under a different name.
What contract terms reduce the risk of factory side sales?
Key terms include: exclusivity — the factory may only produce the product for the buyer; production limits — the factory may not manufacture more units than ordered; non-use restrictions — the factory may not use the product design, tooling, or files for any other customer; non-competition obligations — the factory may not produce or sell similar products in specified markets; and IP filing restrictions — the factory may not file any IP registration based on the product.
What should I do if I think my factory is already selling my product?
Document what you have found — platform listings, product images, seller details, pricing, and any indication of the source. Then review your existing agreements to assess what contractual protections are in place. A Supplier Control Review can help assess your document position and identify what options may be available based on the specific facts, registered IP, and agreement terms.
On this page
Related Resources
Further reading on China supplier control, manufacturing agreements, and IP protection.
Manufacturing Agreement: Tooling, Mold & File Ownership
What your China manufacturing agreement should say about mold ownership, file control, and production restrictions.
Read Answer Practical AnswerShould I File a China Trademark Before Contacting Factories?
Why the timing of trademark registration matters when working with Chinese manufacturers.
Read Answer ServiceChina Supplier Control Review
Independent buyer-side review of your supplier protection structure — covering manufacturing agreement, exclusivity, and production controls.
Learn MoreLinkedIn Newsletter
Read More on the China IP Gateway Newsletter
For weekly, practitioner-level commentary on China IP, NNN agreements, supplier control, trademark and patent strategy, follow the China IP Gateway newsletter on LinkedIn.
Follow the China IP Gateway Newsletter on LinkedIn