Who Should Own My Tooling When I Import Custom Die Cast Parts From China?

We have helped clients source custom die cast parts ¹ for years, and one question comes up more often than almost any other: who owns the mold? Too many buyers pay for tooling, assume they own it, and find out they were wrong only when the supplier refuses to release it.

You should always own the tooling you paid for. The real question is how to make that ownership enforceable. A written contract in Chinese, signed before the mold is built, is the only reliable way to protect your tooling investment when sourcing die cast parts from China. Payment alone does not create legal ownership under Chinese law.

Let's break down exactly what your contract needs to say — and why each piece matters.

Should I Require Written Terms About Tooling Ownership Before I Pay for the Mold?

Every week, our team processes tooling orders for clients in the US and Canada. We see buyers skip this step constantly — and we see what happens when things go wrong.

Yes, you must require written ownership terms before you pay for the mold. Paying without a signed agreement gives your supplier full legal control over the tooling. A contract in Chinese that explicitly transfers title to you upon payment is the only document that holds weight in a Chinese court.

Why Payment Records Are Not Enough

Many buyers believe a wire transfer receipt ² proves they own the tool. It does not. Under Chinese contract law ³, ownership of physical assets is determined by the written contract — not by payment history. If your supplier never signed an agreement saying the tool belongs to you, a Chinese court will not automatically assume it does.

This is not a hypothetical risk. It is the most common tooling dispute our clients bring to us. By the time they ask for help, the relationship has broken down and the supplier is holding their mold.

What the Contract Must Say

The ownership clause needs to cover several specific points:

The Language Must Be in Chinese

An English-language agreement or a contract governed by US law gives you very limited protection in China. If a dispute reaches a Chinese court, the judge will rely on a Chinese-language document. Your contract must be:

• Written in Mandarin Chinese
• Governed by Chinese law
• Signed by a legal representative of the supplier company

Some buyers use a bilingual contract. That is acceptable, but the Chinese version is the controlling version in any Chinese legal proceeding.

When to Get the Agreement Signed

Before you transfer any tooling payment. Once the money is sent, your leverage disappears. The supplier has what they need and you have a verbal understanding. Get the signed contract first, then initiate the wire transfer.

The Cost of Getting This Wrong

A replacement die casting tool for a medium-complexity part typically costs $8,000–$40,000 USD. If a supplier holds that tool hostage, your options are limited to negotiation, mediation, or litigation — all of which take time your production schedule cannot afford. The cost of a proper contract is a few hours of legal review. The cost of not having one can be your entire tooling investment plus months of production delay.

What Contract Language Can Protect My Tooling Rights If Problems Happen Later?

When our team helps clients draft supplier agreements, the tooling section is always where we spend the most time. Getting the language right now prevents expensive problems later.

The contract must include five core protections: ownership upon payment, restricted use of the tooling, IP assignment for design data, maintenance obligations on the supplier, and a clear return mechanism with liquidated damages for non-compliance. Each clause addresses a different way a dispute can arise.

Ownership Must Vest at the Moment of Payment

The clause should say clearly: legal title to the tooling passes to the buyer at the moment payment is made in full. From that point, the supplier holds the tool as a custodian — not as an owner.

This distinction matters. A supplier who claims the tool is theirs until it physically leaves their facility can manufacture delays when you want to switch suppliers. Ownership upon payment, referenced against the tooling serial numbers in your payment records, creates a clean legal timeline.

Restrict How the Supplier Can Use Your Tool

The contract must prohibit the supplier from using your tooling to produce parts for any other customer. Die casting is particularly risky here because the part geometry is permanently encoded in the steel die. Without a use restriction clause, your supplier can run production for a competitor on your mold — legally.

The restriction should cover:

• No production for third parties using your tooling
• No reproduction of your part geometry using new tooling
• No sublicensing of the tooling to another factory

Protect the Design Data, Not Just the Physical Steel

A common oversight: buyers protect the physical mold but forget about the CAD files ⁴. If your tool ever needs repair, modification, or reproduction at end of life, you need the native design data. The contract should require the supplier to:

The supplier should also be prohibited from registering any IP rights ⁵ over your tooling design in China or elsewhere.

Assign Maintenance Responsibility to the Supplier

Your contract should state that the supplier is responsible for keeping the tooling in good working condition throughout the supply relationship. This includes:

• Routine polishing of cavity surfaces
• Ejector pin inspection and replacement
• Cooling channel cleaning
• Stress relief heat treatment at scheduled intervals

The supplier bears all routine maintenance costs. They are liable for damage beyond ordinary wear caused by their own process management. A shot counter provision — requiring the supplier to report cumulative shots with each order — lets you plan refurbishment cycles and verify the tool is not being overrun.

Build in a Return Mechanism With Real Teeth

The return clause should state that upon your written request, the supplier must make the tooling available within 15–30 days. If they miss that deadline, liquidated damages ⁶ apply at a daily rate. That rate should reflect your actual cost of lost production — which makes compliance the supplier's rational choice.

Without this mechanism, a non-cooperative supplier can simply wait. Litigation in China takes months. A liquidated damages clause calibrated correctly creates commercial pressure that achieves compliance faster.

Can My Supplier Keep My Tooling If I Move My Business Elsewhere?

This is the question buyers ask us after the relationship has already soured. The honest answer: it depends entirely on what your contract says.

If your contract clearly states you own the tooling and includes a return mechanism with liquidated damages, your supplier cannot lawfully keep your mold. Without those provisions, they can delay, impose fees, or simply refuse — and your practical remedies are slow and expensive.

The Hostage-Holding Playbook

Suppliers who want to prevent you from leaving have a standard toolkit. Understanding it helps you write contract clauses that neutralize each tactic:

What Happens If You Have No Written Agreement

Without a written ownership agreement, the supplier holds most of the cards. They have the physical tool, they are in their own country, and Chinese courts will look for a written contract to determine ownership. If none exists, the outcome is unpredictable.

In this situation, your practical options are:

• Negotiate: Offer to pay a portion of a disputed amount to recover the tool faster than litigation
• Mediation: Use a China-based commercial mediator ⁷ — faster than courts, but not always successful
• Litigation: File in a Chinese court — possible but slow, expensive, and uncertain

None of these is good. The right answer is a correct contract before you pay for the tool.

The Insolvency Scenario

Supplier bankruptcy ⁸ is a real risk in Chinese manufacturing. If your supplier goes insolvent, their creditors will treat all factory floor assets as collateral — including your tooling — unless your contract establishes the tool is your property held in bailment.

The contract should state:

• The tooling is buyer's property and not part of the supplier's assets
• The supplier's creditors have no claim over the tooling
• The buyer has the right to take physical possession immediately upon supplier insolvency

This language is not a guarantee — Chinese insolvency proceedings are complex — but it is the strongest practical position available and is far better than silence.

The Right Time to Address This Is Before It Becomes a Problem

We have walked clients through tooling disputes. They are always expensive, always slow, and always avoidable. The supplier who wants to hold your tool hostage today is usually the supplier who showed early warning signs that were overlooked — inconsistent communication, reluctance to sign formal agreements, vague answers about tooling procedures.

A supplier who pushes back on reasonable ownership language in a contract is telling you something important. That resistance itself is a selection signal.

What Tooling Records Should I Request to Protect My Investment?

Our project managers maintain tooling registers for every active client program. This is not extra work — it is how you keep control of assets that physically sit in another country.

You should request and maintain: tooling serial numbers with photos, trial run and qualification reports, shot count records updated with each order, CAD files and manufacturing drawings, maintenance logs, and a signed tooling receipt confirming your ownership. These records let you act quickly if a dispute arises.

Build a Tooling Register From Day One

A tooling register is a simple internal document — a spreadsheet or database — that records every piece of tooling you own at every supplier. It should contain:

• Tool name and part number
• Supplier name and factory address
• Serial number engraved on the physical tool
• Date of payment and amount
• Designed shot life
• Current shot count (updated each order)
• Last maintenance date and type
• Location of CAD files

Update it with each production order. This record, combined with your signed contract, gives you everything you need to act quickly if a dispute arises.

The Documents to Request at Tool Qualification

When a new tool is qualified — meaning it has passed its first article inspection ⁹ and is approved for production — request the following:

The signed tooling receipt is the simplest and most overlooked document. It is a one-page statement, signed by the supplier's legal representative, confirming that the named tooling is the buyer's property, held at the supplier's facility for production purposes. It reinforces the contract and creates an additional signed record.

Ongoing Records During Production

Once production is running, require the supplier to report:

• Shot count with each production order
• Any maintenance performed, with dates and description
• Any damage to the tooling, immediately upon occurrence
• Any repair work, with photos and description before and after

This is not burdensome. A good supplier tracks this themselves. A supplier who resists providing shot counts or maintenance records is a supplier who is not maintaining your asset properly.

What to Do If a Supplier Refuses to Provide Records

Refusal to provide tooling documentation is a serious red flag. If your contract requires it and the supplier refuses, they are in breach. Document the request and refusal in writing — email is sufficient — and escalate.

If you are using a sourcing partner, this is exactly the situation where your partner's on-the-ground presence matters. Our Vietnam and China teams conduct periodic supplier audits that include physical verification of tooling condition and shot count records. An audit finding discrepancy is far easier to address while the relationship is active than after a dispute has started.

Why This Matters More Than Most Buyers Realize

Tooling for die cast parts has a designed shot life — typically 100,000 to 500,000 shots depending on tool steel grade, part complexity, and alloy being cast. A supplier who overruns your tool without telling you is consuming your asset. When you eventually discover the tool is at end of life, you face an unexpected tooling cost — for a tool that should have lasted longer if it had been maintained and tracked properly.

For buyers sourcing from China, an NNN agreement ¹⁰ covering non-disclosure, non-use, and non-circumvention works alongside your tooling ownership contract to close the full circle of IP and asset protection.

Records give you visibility. Visibility gives you control. Control is what you paid for when you bought the tool.

Conclusion

Tooling ownership is not complicated in principle. You paid for it — you should own it. But "should" requires a written Chinese-language contract, specific clauses, and ongoing documentation to become "do." Get the agreement signed before you transfer payment, and the rest follows.

Footnotes

1. Overview of the die casting process, materials, and key manufacturing considerations. ↩︎
2. How T/T wire transfers work when paying Chinese suppliers for tooling or production. ↩︎
3. Guide to private ownership rights and asset protection under China's Civil Code. ↩︎
4. Real examples of IP theft in China, including loss of CAD and design files to suppliers. ↩︎
5. How to protect intellectual property rights when developing new products with Chinese manufacturers. ↩︎
6. When liquidated damages clauses are enforceable and how courts evaluate them. ↩︎
7. U.S. Department of Commerce guide to resolving commercial disputes with Chinese companies. ↩︎
8. What buyers should expect and how to protect tooling rights when a supplier enters insolvency. ↩︎
9. What first article inspection is and how it validates a manufacturing process before full production. ↩︎
10. How to draft an enforceable NNN agreement with Chinese manufacturers to protect IP and business relationships. ↩︎