Cease and Desist Letter - Intellectual Property Infringement - Delaware
CEASE AND DESIST LETTER
Intellectual Property Infringement - Delaware
Federal IP Law, Delaware Deceptive Trade Practices Act (6 Del. C. § 2531), and Delaware Trademark Act (6 Del. C. § 3301)
SENT VIA: ☐ Certified Mail, Return Receipt Requested ☐ Federal Express / Overnight Courier ☐ Email (with delivery/read receipt) ☐ Personal Service ☐ Other: [________________________________]
LETTERHEAD
[________________________________]
[Law Firm / Rights Holder Name]
[________________________________]
[Street Address]
[________________________________]
[City, State, ZIP]
[________________________________]
[Telephone]
[________________________________]
[Email]
Date: [__/__/____]
To:
[________________________________] ("Infringer")
[________________________________]
[Street Address]
[________________________________]
[City, State, ZIP]
Attn: [________________________________]
Re: IMMEDIATE CEASE AND DESIST - Unauthorized Use of Intellectual Property
Our Client: [________________________________] ("Rights Holder")
IP at Issue: [________________________________]
1. INTRODUCTION AND PURPOSE
Dear [________________________________]:
This firm represents [________________________________] ("Rights Holder") in the protection and enforcement of its intellectual property rights. We write to provide formal notice that [________________________________] ("Infringer") is engaging in activities that constitute infringement of our client's intellectual property in violation of federal law, Delaware statutory law, and common law.
This letter serves as:
- Formal notice of Rights Holder's IP ownership and Infringer's unauthorized activities
- Demand for immediate and complete cessation of all infringing conduct
- Litigation hold notice requiring preservation of all related evidence
- Notice that Rights Holder will pursue all available legal remedies without further warning if compliance is not achieved
Rights Holder expressly reserves all rights and remedies under federal law, the Delaware Deceptive Trade Practices Act (6 Del. C. § 2531 et seq.), the Delaware Trademark Act (6 Del. C. § 3301 et seq.), the Delaware Uniform Trade Secrets Act (6 Del. C. § 2001 et seq.), and common law.
2. RIGHTS HOLDER'S INTELLECTUAL PROPERTY
A. Trademark Rights
☐ Rights Holder owns the following federally registered trademark(s):
| Mark | Registration No. | Registration Date | Classes | Status |
|---|---|---|---|---|
| [________________________________] | [________________________________] | [__/__/____] | [____] | Active |
| [________________________________] | [________________________________] | [__/__/____] | [____] | Active |
☐ Rights Holder owns the following Delaware state trademark registration(s) under 6 Del. C. § 3301 et seq.:
| Mark | Registration No. | Registration Date |
|---|---|---|
| [________________________________] | [________________________________] | [__/__/____] |
☐ Rights Holder claims common law trademark rights based on continuous use since [________________________________].
B. Copyright Rights
☐ Rights Holder owns the following copyrighted work(s):
| Work | Type | Registration No. | Registration Date |
|---|---|---|---|
| [________________________________] | [________________________________] | [________________________________] | [__/__/____] |
C. Patent Rights
☐ Rights Holder owns the following United States Patent(s):
| Patent Title | Patent No. | Issue Date | Relevant Claims |
|---|---|---|---|
| [________________________________] | [________________________________] | [__/__/____] | [________________________________] |
Note: Delaware, particularly the U.S. District Court for the District of Delaware, is one of the nation's leading patent litigation venues. Many technology companies are incorporated in Delaware, establishing jurisdiction for patent claims.
D. Trade Secrets
☐ Rights Holder possesses trade secrets protected under the Defend Trade Secrets Act (18 U.S.C. § 1836) and the Delaware Uniform Trade Secrets Act (6 Del. C. § 2001 et seq.).
3. INFRINGEMENT - FACTUAL ALLEGATIONS
A. Nature of Infringement
☐ Trademark Infringement: Infringer uses a mark identical or confusingly similar to Rights Holder's mark(s) in connection with:
- [________________________________]
- Specific infringing uses: [________________________________]
- Likelihood of confusion exists under the Third Circuit's Interpace factors because: [________________________________]
☐ Copyright Infringement: Unauthorized reproduction, distribution, display, performance, or creation of derivative works:
- Infringing material: [________________________________]
- Method: ☐ Direct copying ☐ Distribution ☐ Public display ☐ Digital reproduction ☐ Derivative work ☐ Other: [________________________________]
- Location: [________________________________]
☐ Patent Infringement: Unauthorized making, using, selling, offering to sell, or importing:
- Infringing product/process: [________________________________]
- Infringed claim(s): [________________________________]
- Type: ☐ Direct ☐ Induced (35 U.S.C. § 271(b)) ☐ Contributory (35 U.S.C. § 271(c))
☐ Trade Secret Misappropriation: Unauthorized acquisition, disclosure, or use:
- Trade secret: [________________________________]
- Means: [________________________________]
☐ Deceptive Trade Practices (6 Del. C. § 2532): Including but not limited to:
- Passing off goods or services as those of another (§ 2532(a)(1))
- Causing likelihood of confusion as to source, sponsorship, or affiliation (§ 2532(a)(2))
- Using deceptive representations in connection with goods or services (§ 2532(a)(5))
- Engaging in other conduct creating a likelihood of confusion or misunderstanding (§ 2532(a)(12))
B. Evidence
☐ Screenshots of infringing websites, digital content
☐ Photographs of infringing physical products
☐ Purchase receipts or order confirmations
☐ Marketing and advertising materials
☐ Domain registrations or social media profiles
☐ Consumer confusion evidence
☐ Other: [________________________________]
Evidence attached as Schedule B.
C. Duration and Scope
Ongoing since approximately [________________________________].
- Geographic scope: [________________________________]
- Channels: ☐ Online ☐ Retail ☐ Wholesale ☐ Social media ☐ Other: [________________________________]
4. LEGAL BASIS FOR CLAIMS
A. Federal Claims
Lanham Act Trademark Infringement (15 U.S.C. § 1114): Unauthorized use of a confusingly similar mark. The Third Circuit applies the Interpace Corp. v. Lapp, Inc., 721 F.2d 460 (3d Cir. 1983) factors for likelihood of confusion analysis, including: (1) degree of similarity; (2) strength of plaintiff's mark; (3) price of goods; (4) channels of trade; (5) advertising; (6) intent of defendant; (7) actual confusion; (8) quality of defendant's goods; (9) sophistication of consumers; and (10) other relevant factors.
False Designation of Origin (15 U.S.C. § 1125(a)): Infringer's use creates a false impression of source, sponsorship, or affiliation.
Trademark Dilution (15 U.S.C. § 1125(c)): If Rights Holder's marks were famous before Infringer's challenged use began and that use is likely to cause dilution by blurring or tarnishment, Rights Holder may seek relief under the federal dilution provision.
Copyright Infringement (17 U.S.C. § 501): Unauthorized reproduction, distribution, display, or derivative works of copyrighted material.
Patent Infringement (35 U.S.C. § 271(a)): Direct infringement requires a patented invention, an act of making, using, offering to sell, or selling within the United States (or importing into the United States), lack of authority, and conduct during the patent term. Identify each asserted claim and map every claim element to the accused product or process; do not infer infringement from product similarity alone. The U.S. District Court for the District of Delaware has local patent rules that may apply when venue and jurisdiction are otherwise proper.
B. Delaware State Claims
Delaware Deceptive Trade Practices Act (6 Del. C. § 2531 et seq.):
- § 2532(a): Defines deceptive trade practices, including passing off, causing confusion as to source, and false representation of goods
- § 2533(a): A person likely to be damaged by a deceptive trade practice may obtain an injunction
- § 2533(b): The court may award fees to the prevailing party in an exceptional case; assessment against a defendant also requires a finding of willful deceptive conduct
- § 2533(c): Damages awarded under an independent Delaware common-law or statutory basis for the same conduct are trebled; the no-monetary-damage rule for an injunction appears in § 2533(a)
Delaware Trademark Act (6 Del. C. § 3301 et seq.):
- § 3312: Infringement of registered Delaware marks
- § 3313: Injunctive relief for likely injury to business reputation or dilution; § 3314(e) separately permits profits or profits and damages for covered counterfeit or imitation conduct
- § 3314: Trademark dilution protection for marks with distinctiveness in Delaware
Delaware Uniform Trade Secrets Act (6 Del. C. § 2001 et seq.):
- § 2002: Injunctive relief for actual or threatened misappropriation
- § 2003: Damages including unjust enrichment and reasonable royalties
- § 2004: Attorneys' fees for willful misappropriation or bad faith claims
Common Law: Delaware recognizes common law claims for unfair competition, passing off, and tortious interference.
5. DEMANDS
Rights Holder requests that Recipient take the following actions on or before 5:00 p.m. Eastern Time on [__/__/____] (the "Compliance Deadline"), which is [____] calendar days from this letter:
A. Immediate Cessation
5.1. Immediately and permanently cease all manufacture, reproduction, distribution, display, advertising, promotion, sale, importation, and use of Infringing Material.
5.2. Remove all Infringing Material from:
☐ All websites, web pages, and online platforms
☐ All social media accounts and profiles
☐ All third-party marketplaces
☐ All physical locations and inventory
☐ All advertising, marketing, and promotional materials
☐ All signage, packaging, trade dress, and business materials
☐ All domain names incorporating Rights Holder's marks
☐ Other: [________________________________]
B. Signed Response
5.3. Provide a signed written response identifying which requested steps Recipient has taken, declined, or proposes to modify.
C. Accounting
5.4. Provide a complete accounting of revenues, units, channels, and dates related to Infringing Material.
D. Surrender or Destruction
5.5. Deliver to Rights Holder or destroy and provide signed confirmation of destruction for all Infringing Material, including digital files, production materials, and inventory.
E. Domain Transfer
5.6. Transfer any infringing domain names to Rights Holder: [________________________________]
6. PRESERVATION OF EVIDENCE
LITIGATION HOLD: Immediately preserve all documents, ESI, and tangible items relating to the IP and Infringing Material, including:
☐ Source files, design files, production records
☐ Financial records, invoices, receipts
☐ All correspondence (email, text, messaging)
☐ Website analytics, advertising data
☐ Manufacturing records, supplier communications
☐ Social media content
☐ Backups and cloud storage
Fed. R. Civ. P. 37(e) applies to ESI that should have been preserved in anticipation or conduct of litigation, is lost because reasonable steps were not taken, and cannot be restored or replaced. Available measures depend on prejudice or intent; receipt of this letter does not automatically create sanctions, an adverse inference, or contempt.
7. CONSEQUENCES OF NON-COMPLIANCE
A. Injunctive Relief
Rights Holder may seek available injunctive relief in a court with subject-matter jurisdiction and proper venue. Claims arising under federal patent or copyright law must be brought in federal court under 28 U.S.C. § 1338(a). Delaware state-law claims may be brought in a Delaware court with jurisdiction over the particular claim and requested relief.
B. Monetary Damages
Trademark: Profits, actual damages, costs, and exceptional-case fees under 15 U.S.C. § 1117(a), where established; statutory damages and special trebling under § 1117(b)-(c) are limited to qualifying counterfeit-mark cases.
Copyright: Actual damages and profits or an election of statutory damages under 17 U.S.C. § 504, subject to the registration and timing limits in §§ 411 and 412; fees under § 505 are discretionary.
Patent: Compensatory damages not less than a reasonable royalty and possible enhancement under 35 U.S.C. § 284; patent law does not supply generic statutory damages or disgorgement for ordinary utility-patent infringement.
Delaware DTPA: Injunctive relief under § 2533(a); exceptional-case fees under § 2533(b), with a willfulness finding required to assess fees against a defendant; and § 2533(c) trebling only when another Delaware basis supports damages.
Delaware Trademark Act: Section 3313 authorizes dilution/reputation injunctions; § 3314(e) permits profits or profits and damages within its counterfeit/ imitation scope. Neither section supplies a general prevailing-party fee claim.
Delaware Trade Secrets Act: Damages including unjust enrichment; attorneys' fees for willful misappropriation (6 Del. C. §§ 2003-2004).
C. Attorneys' Fees
- 15 U.S.C. § 1117(a) (trademark)
- 17 U.S.C. § 505 (copyright)
- 35 U.S.C. § 285 (patent)
- 6 Del. C. § 2533(b) (DTPA)
- 6 Del. C. § 3313 (Delaware Trademark Act)
- 6 Del. C. § 2004 (Trade Secrets Act)
D. Additional Remedies
- Impoundment and destruction of infringing goods
- DMCA takedown notices (17 U.S.C. § 512)
- For qualifying registered trademarks or copyrights, CBP recordation and applicable border measures (19 C.F.R. Part 133; 19 U.S.C. § 1526 applies to trademarked merchandise)
- Criminal referral where appropriate
- ITC exclusion orders for imported infringing goods (19 U.S.C. § 1337)
8. RESERVATION OF RIGHTS
Nothing herein constitutes a waiver, admission, limitation, or license. All rights and remedies are expressly reserved.
9. DISPUTE RESOLUTION AND FORUM
9.1. Governing Law. Federal IP law governs federal claims. Delaware law governs state claims where not preempted.
9.2. Potential Forum. [IDENTIFY ONLY AFTER COUNSEL CONFIRMS SUBJECT-MATTER JURISDICTION, PERSONAL JURISDICTION, AND VENUE]. This letter does not create forum selection by unilateral statement.
9.3. Resolution. Rights Holder prefers resolution without litigation. Compliance by the Deadline may facilitate settlement discussions. This does not waive any right or extend the Deadline.
10. RESPONSE REQUESTED
Direct all communications to the undersigned. Written response required by the Compliance Deadline.
Sent without prejudice to all rights.
Respectfully,
_____________________________________________
[________________________________]
[Title]
[Law Firm / Rights Holder]
[Delaware Bar Number]
[Address]
[Telephone]
[Email]
cc: [________________________________]
Enclosures:
- Schedule A - IP Registration Certificates
- Schedule B - Evidence of Infringing Material
- Schedule C - Optional Signed Response
SCHEDULE A - IP DOCUMENTATION
(Attach registrations, certificates, patent documents)
SCHEDULE B - EVIDENCE OF INFRINGEMENT
(Attach screenshots, photographs, receipts, dated and sourced)
SCHEDULE C - OPTIONAL SIGNED RESPONSE
I, [________________________________], provide the following signed response based on information reasonably available to me:
- I am authorized to execute this on behalf of [________________________________].
- Full compliance with all demands in the letter dated [__/__/____] has been achieved.
- Specifically:
☐ All infringing activities have permanently ceased.
☐ All Infringing Material removed from all platforms and locations.
☐ Inventory ☐ delivered to Rights Holder / ☐ destroyed (proof attached).
☐ Complete accounting attached.
☐ Domain names transferred (if applicable).
☐ All evidence preserved.
- All information is true, correct, and complete.
Executed this [____] day of [________________________________], 20[____].
Signature: _____________________________________________
Name: [________________________________]
Title: [________________________________]
SOURCES AND REFERENCES
- 15 U.S.C. § 1051 et seq. - Lanham Act (federal trademark)
- 15 U.S.C. § 1114 - Infringement of registered marks
- 15 U.S.C. § 1125(a) - False designation of origin
- 15 U.S.C. § 1125(c) - Trademark dilution
- 15 U.S.C. § 1116-1118 - Trademark remedies
- 17 U.S.C. § 101 et seq. - Copyright Act
- 17 U.S.C. § 501-505 - Copyright infringement and remedies
- 17 U.S.C. § 512 - DMCA
- 35 U.S.C. § 271, 281-285 - Patent infringement and remedies
- 6 Del. C. § 2531 et seq. - Delaware Deceptive Trade Practices Act
- 6 Del. C. § 2532 - Deceptive trade practices defined
- 6 Del. C. § 2533 - Remedies (injunction, attorneys' fees)
- 6 Del. C. § 3301 et seq. - Delaware Trademark Act
- 6 Del. C. § 3312-3314 - Trademark infringement, remedies, dilution
- 6 Del. C. § 2001 et seq. - Delaware Uniform Trade Secrets Act
- 18 U.S.C. § 1836 - Defend Trade Secrets Act
- Interpace Corp. v. Lapp, Inc., 721 F.2d 460 (3d Cir. 1983) - Third Circuit confusion factors
- Halo Elecs., Inc. v. Pulse Elecs., Inc., 579 U.S. 93 (2016) - Enhanced patent damages standard
- D. Del. Local Patent Rules - U.S. District Court for the District of Delaware
This template is provided for informational and educational purposes only. It does not constitute legal advice. Federal IP law and Delaware state law are subject to change. Delaware is a leading IP litigation jurisdiction; consult with qualified Delaware counsel before sending any cease and desist communication.
About this template
- Last updated
- October 9, 2026
- Jurisdiction
- Delaware
- Category
- Intellectual Property
Legal authority
- 15 U.S.C. § 1051 et seq. (Lanham Act - Federal Trademark)
- 15 U.S.C. § 1114 (Trademark infringement - registered marks)
- 15 U.S.C. § 1125(a) (False designation of origin / unfair competition)
- 15 U.S.C. § 1125(c) (Trademark dilution)
- 17 U.S.C. § 101 et seq. (Copyright Act)
- 17 U.S.C. § 501 (Copyright infringement)
- 17 U.S.C. § 512 (DMCA)
- 35 U.S.C. § 271 (Patent infringement)
- 35 U.S.C. § 281-285 (Patent remedies)
- 6 Del. C. § 2531 et seq. (Delaware Deceptive Trade Practices Act)
- 6 Del. C. § 2532 (Deceptive trade practices defined)
- 6 Del. C. § 2533 (Remedies for deceptive trade practices)
- 6 Del. C. § 3301 et seq. (Delaware Trademark Act)
- 6 Del. C. § 3313 (injury to business reputation and dilution; injunctive relief)
- 6 Del. C. § 3314 (remedies for counterfeit or imitation marks and designs)
- 6 Del. C. § 2001 et seq. (Delaware Uniform Trade Secrets Act)
Intellectual property law protects inventions, brand names, creative works, and trade secrets. Filings with federal IP offices have strict formal requirements, and demand letters or licensing agreements have to identify the exact rights being claimed. Weak IP paperwork makes it harder to enforce your rights against copycats, harder to sell or license your IP, and easier for someone else to claim it first.
Not legal advice
This template is provided for informational purposes. We recommend having an attorney review any legal document before signing, especially for high-value or complex matters.
Checked against the law it cites
The statutes this template relies on are listed under Legal authority.
28 U.S.C. § 1338(a) (checked October 9, 2026): "No State court shall have jurisdiction over any claim for relief arising under any Act of Congress relating to patents, plant variety protection, or copyrights."
6 Del. C. § 2533(b)–(c) (checked October 7, 2026): "The court in exceptional cases may award reasonable attorneys’ fees to the prevailing party. Costs or attorneys’ fees may be assessed against a defendant only if the court finds that defendant has wilfully engaged in a deceptive trade practice."
6 Del. C. § 3313 (checked October 7, 2026): "Likelihood of injury to business reputation or of dilution of the distinctive quality of a mark registered under this chapter, or a mark valid at common law or a trade name valid at common law, shall be a ground for injunctive relief notwithstanding the absence of competition between the parties, or the absence of confusion as to the source of goods or services."
6 Del. C. § 3314(e) (checked October 7, 2026): "the Court may further require the defendants to pay to such plaintiff all profits derived from such wrongful manufacture, use, display or sale, or both profits and damages."
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