Trademark Infringement: What It Is and What to Do About It

Trademark Infringement: What It Is and What to Do About It

Discovering that someone is using your trademark — or a confusingly similar mark — can be alarming. Trademark infringement undermines your brand, confuses your customers, and can erode years of reputation-building. This guide explains what constitutes infringement, how to detect it, and the escalating enforcement options available to trademark owners.

What Is Trademark Infringement?

Trademark infringement occurs when someone uses a mark in commerce that is likely to cause confusion with your existing trademark. The infringing use doesn't need to be identical — it only needs to be similar enough that consumers might be confused about the source of goods or services.

Infringement applies to both registered and unregistered marks, though federal registration provides significantly stronger enforcement tools.

*Citation: Lanham Act § 32 (infringement of registered marks), 15 U.S.C. § 1114; § 43(a) (infringement of unregistered marks), 15 U.S.C. § 1125(a)*

Types of Trademark Infringement

Direct Infringement

Using the same or a confusingly similar mark on the same or related goods/services. This is the most common type — the likelihood of confusion analysis applies.

Counterfeiting

The intentional use of a spurious mark that is identical or substantially indistinguishable from a registered mark. Counterfeiting carries enhanced penalties including statutory damages up to $2,000,000 per counterfeit mark.

Contributory Infringement

Knowingly providing a service or product that enables or facilitates another party's infringement. This can apply to manufacturers, distributors, or online marketplace operators.

Trademark Dilution

Available only for famous marks — dilution occurs when a similar mark weakens the distinctive quality of a famous mark through:

• Blurring — Association that impairs the distinctiveness (e.g., "GOOGLE" used for unrelated restaurants)
• Tarnishment — Association that harms the reputation (e.g., a famous mark used on inferior or unsavory goods)

*Citation: 15 U.S.C. § 1125(c) — Dilution*

How to Detect Infringement

Proactive monitoring is essential. By the time you accidentally discover infringement, significant damage may already be done.

Monitoring Methods

• Trademark monitoring services — Automated watching of trademark registers worldwide for confusingly similar applications
• Google Alerts — Free monitoring for your brand name mentions online
• Marketplace monitoring — Regular searches on Amazon, eBay, Etsy, and AliExpress
• Social media monitoring — Watch for unauthorized use on Instagram, Facebook, TikTok
• Domain name monitoring — WHOIS alerts for domains containing your mark

For a complete monitoring strategy, see our guide on trademark monitoring and enforcement.

The Enforcement Escalation Ladder

Trademark enforcement should be proportional and strategic. Start with the least aggressive option and escalate as needed:

Step 1: Cease and Desist Letter

The first step in most infringement situations. A well-crafted cease and desist letter:

• Identifies your trademark rights
• Describes the infringing activity
• Demands that the infringer stop
• Sets a deadline for compliance (typically 10–30 days)
• Warns of legal consequences if ignored

Success rate: Many infringement situations are resolved at this stage. Infringers who are unaware of your rights often comply quickly.

Step 2: UDRP for Domain Names

If someone has registered a domain name containing your trademark, you can file a complaint under the Uniform Domain-Name Dispute-Resolution Policy (UDRP) with WIPO or another approved dispute resolution provider.

Requirements: You must show (1) the domain is identical or confusingly similar to your mark, (2) the registrant has no legitimate interest, and (3) the domain was registered and is being used in bad faith.

Step 3: Platform Brand Protection

Major e-commerce and social media platforms offer brand protection tools:

• Amazon Brand Registry — Report and remove infringing listings
• eBay VeRO Program — Remove counterfeit listings
• Meta (Facebook/Instagram) — Report IP violations
• Google — DMCA and trademark complaints for ads and search results

Step 4: TTAB Opposition or Cancellation

If the infringer has filed or obtained a trademark registration:

• Opposition — Challenge the mark before registration (30-day window). See our guide on trademark opposition
• Cancellation — Challenge an existing registration (available for 5 years on most grounds, indefinitely for fraud or genericness)

Step 5: Federal Court Litigation

The most powerful but most expensive enforcement option. Federal trademark litigation provides access to:

• Injunctive relief (court order to stop infringement)
• Monetary damages
• Attorney fees (in exceptional cases)
• Destruction of infringing goods

Cease and Desist Letters: Best Practices

A well-written cease and desist letter is your most cost-effective enforcement tool:

Pro Tip: Always have an attorney send the cease and desist letter. Letters from attorneys carry significantly more weight than those sent by the trademark owner directly. They signal that you're serious about enforcement and prepared to litigate if necessary.

Available Remedies in Federal Court

*Citation: 15 U.S.C. § 1117 — Recovery for Infringement*

Defending Against an Infringement Claim

If you've received a cease and desist letter or been sued for infringement, several defenses are available:

• Fair use — Descriptive fair use (using a term in its ordinary descriptive sense) or nominative fair use (referring to the mark owner's actual product)
• Parody — Protected expression that comments on the original mark (limited defense)
• Prior rights — You may have common law rights predating the plaintiff's registration
• Laches — The plaintiff waited too long to assert their rights
• No likelihood of confusion — The marks and/or goods are sufficiently different
• Abandonment — The plaintiff has abandoned the mark through non-use

Cost of Enforcement

Pro Tip: The cost of enforcement increases dramatically at each level. That's why proactive monitoring and early cease and desist letters are so important — they resolve most infringement situations at a fraction of the cost of litigation.

*Need help protecting your trademark? From cease and desist letters to litigation support, our team handles enforcement at every level. Get Legal Help →*