Practical Answer — Manufacturing Risk

Can a Chinese Factory Produce Extra Units Without Authorization?

Last updated: June 2026

Overrun production — units made using your design or tooling beyond what you ordered — is a documented risk in China manufacturing. Whether you can address it depends heavily on what your manufacturing agreement says.

In short

A Chinese factory can physically produce more units than you ordered — using your design, molds, and branding — without your knowledge. Whether this is a breach, and what remedies are available, depends on what your manufacturing agreement says, whether you have IP registrations in China, and the evidence you can gather. Without explicit contractual controls and China IP registrations, addressing overrun production is significantly harder.

The Direct Answer

Yes — a factory can produce overrun units and often does so quietly. Whether you have a remedy depends on what your manufacturing agreement prohibits, whether you have registered trademarks or design patents in China covering the product, and whether you can detect and document the overrun production.

What Overrun Production Is

Overrun production refers to units manufactured by the factory beyond the quantity specified in your purchase order — using your product design, molds, tooling, branding, and specifications — without your authorization or knowledge.

These units typically end up in one of several channels:

Sold into markets where you do not distribute — grey market export, unauthorized retail, online platforms in other countries
Sold domestically under your brand or a similar brand name
Sold to a competing buyer at a lower price, funded by the reduced marginal cost of your tooling
Warehoused and used to fulfill future orders from other buyers

Why Factories Produce Overrun Units

Tooling cost recovery

Molds and tooling have a fixed cost. If the buyer's order quantity is lower than expected, the factory may run additional units to recover tooling amortization — without disclosing this to the buyer.

Margin improvement

Once tooling and setup are paid for, additional units have low marginal cost. The factory captures the full sale price on overrun units with minimal incremental cost.

Buffer stock management

Some factories run slightly over to account for defects or future re-orders — but these excess units may be sold instead of scrapped if demand does not materialize.

Opportunistic selling

If the factory has a separate distribution channel, branded goods can be sold under your name or a similar name into markets you are not actively monitoring.

Contract Terms That May Address Overrun Production

The degree to which overrun production can be controlled contractually depends on what the manufacturing agreement expressly states. Terms that are typically relevant include:

Prohibition on excess production

An explicit clause prohibiting production beyond the ordered quantity without prior written approval. This creates a clear breach standard — but detection is still required.

Production count obligation

A requirement that the factory log all units produced under each order, with audit rights for the buyer or a nominated third party. Without a count obligation, proving overrun quantities is difficult.

Mold and tooling control

Terms specifying that molds and tooling may only be used for orders authorized by the buyer, and that unauthorized use constitutes a breach. Mold ownership provisions reinforce this.

IP ownership and license scope

Clauses specifying that all IP in the product design, branding, and packaging is owned by the buyer and is licensed to the factory only for the authorized production run. Use outside the license scope may support an IP claim.

Liquidated damages

A pre-specified damages figure per unauthorized unit, which avoids the difficulty of proving actual damages from overrun production. These are more commonly included in stronger manufacturing agreements.

How Overrun Production May Be Detected

Your product appears on marketplace platforms (e.g. Alibaba, Taobao, Amazon) at prices below your own supply chain cost
Distributors or customers report encountering the same product from a different source
Customs records (where accessible) show exports of your product from the factory to unknown buyers
Test purchases of market products reveal identical manufacturing marks, mold cavitation, or batch codes consistent with your factory
The factory's own social media or marketing materials reference your product or show it in production contexts outside your authorized orders

Get Help

Review Your Manufacturing Agreement

If your current manufacturing agreement does not address overrun production, tooling use controls, or production count obligations, that can be addressed before the next order or contract renewal.

China Manufacturing Agreement Review Contact Us

Frequently Asked Questions

What are overrun units in China manufacturing?

Overrun units are production runs of your product — using your design, branding, materials, or molds — beyond the quantity you ordered. They may be sold through parallel channels, exported under different buyer names, or warehoused for later use. The factory uses your tooling and specifications but does not deliver or disclose the extra units to you.

Is overrun production common in China?

It does occur and is well documented. The degree to which it is addressed in a relationship depends partly on what the manufacturing agreement says. In relationships with no explicit prohibition on excess production, the factory may view overrun units as a legitimate recovery of fixed costs from a short order run. In relationships with strong contractual controls, it is a clear breach.

How can I detect if a factory is producing overrun units?

Detection is difficult. Signs may include: your product appearing in markets you do not sell to; third-party sellers with lower prices than your own supply; brand confusion online; or product quality inconsistencies in the market (overruns may be produced outside normal QC). Factory audits, third-party test purchases, and production records in the manufacturing agreement can all help create detection opportunities.

What contract terms address overrun production?

Terms that may be relevant include: an explicit prohibition on excess production beyond the ordered quantity; a production count obligation (requiring the factory to log all units produced); mold and tooling control terms (preventing production outside scheduled runs); IP ownership clauses (covering the product design and brand); and liquidated damages provisions for unauthorized production. Whether and how these terms are enforceable depends on the specific agreement and facts.

Can I take action against a factory for overrun units even without an explicit contract clause?

Possibly — but it depends on the facts and applicable law. If the factory used your registered trademark or design patent in producing the units, you may have IP-based remedies regardless of what the contract says. If there is no IP registration and no explicit contract prohibition, the position is more fact-specific. The documentation that exists — orders, production records, correspondence — will be relevant to any claim.

Related Resources

Further reading on unauthorized factory production, manufacturing agreement terms, and China IP protection.

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