Is a cease and desist letter legally binding?

A cease and desist letter is not a court order, so it does not by itself carry legal penalties. However, it puts the recipient on formal notice, creates a documented record of your demand to stop the patent infringement, and is often an important first step before escalating to court.

Will the other person know I used a template?

No. Your finished letter is a clean, professional document with no watermark or branding — it reads exactly as a letter you wrote yourself or had drafted for you.

Do I need a lawyer to send this?

For most patent situations, no — people send cease and desist letters themselves every day. If your situation is complex, high-value, or involves immediate danger, we recommend consulting a licensed attorney.

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Cease & Desist Letter for Patent Infringement

Protect your invention. Demand another party stop making, using, or selling a product that infringes your patent. Answer a few questions and download a firm, professional letter.

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June 22, 2026

C&D
Seal

Re: Cease & Desist — Patent Infringement

To Whom It May Concern,

This letter serves as formal notice that you must immediately cease and desist all conduct described below directed toward the undersigned.

You are hereby demanded to stop this conduct entirely. You have 14 days from the date of this letter to comply…

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When to send a cease & desist for patent

A patent gives you the right to stop others from making, using, or selling your invention. A cease and desist letter is a standard first step to enforce it. Send one when another party is:

Selling a product that copies your patented invention
Manufacturing or importing an infringing product
Using your patented process or method without a license
Refusing to stop after being made aware of your patent

Every letter includes

Your details and the recipient's
A clear demand to cease the conduct
A firm compliance deadline
A warning of legal consequences
Space for your dated signature

Frequently asked questions

Yes — it makes the demand far stronger. Add the patent number and a description of the infringing product in the form.

Patentcease & desist letters by state

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