A Foreign Competitor Is Using Your Brand, Code, and Customers: When Can a U.S. Court Enter an Injunction? U.S. Federal Courts

A U.S. court can enter an injunction against a foreign competitor when the court has jurisdiction, the defendant has been properly served or otherwise brought before the court, the conduct falls within U.S. law, and the plaintiff proves the required injunction factors. For brand misuse, copied software code, trade-secret misuse, or customer diversion, the strongest cases usually show domestic harm, U.S.-directed conduct, urgent irreparable injury, and evidence that money damages will not be enough.

The harder question is not whether the competitor is foreign. It is whether the U.S. court can lawfully reach the defendant, the conduct, the assets, the platforms, and the people helping the misconduct continue.

The Answer Depends On...

The answer depends on:

• whether the foreign competitor has U.S. contacts, U.S. sales, U.S. customers, U.S. servers, U.S. distributors, or U.S.-directed marketing;

• whether the case involves trademark infringement, copyright infringement, trade-secret misappropriation, false advertising, unfair competition, breach of contract, or computer misuse;

• whether the defendant used the brand, code, or customer relationships in U.S. commerce;

• whether the copied code is protected by copyright, trade-secret law, contract, or all three;

• whether customer information qualifies as a trade secret;

• whether the plaintiff can show irreparable harm;

• whether service abroad is required under Rule 4, the Hague Service Convention, or another method;

• whether the court can bind affiliates, officers, distributors, platforms, or people acting in concert with the defendant;

• whether emergency relief is needed before notice;

• whether a bond is required;

• whether the injunction would regulate foreign conduct too broadly; and

• whether the order must be stayed or appealed immediately.

What Kind of Injunction Can a U.S. Court Enter?

A U.S. court may enter different forms of injunctive relief depending on the record.

Common orders include:

• a temporary restraining order;

• a preliminary injunction;

• a permanent injunction;

• an order preserving evidence;

• an order prohibiting use of a trademark or confusingly similar name;

• an order requiring removal of infringing online content;

• an order prohibiting use or disclosure of source code;

• an order requiring return or deletion of trade-secret material;

• an order preventing customer solicitation based on stolen information;

• an order requiring transfer, suspension, or disabling of infringing domains or accounts where legally supported;

• an order prohibiting affiliates or agents from acting in concert with the defendant; and

• in extraordinary trade-secret cases, a civil seizure order.

Rule 65 of the Federal Rules of Civil Procedure governs temporary restraining orders and preliminary injunctions in federal court. It requires specificity, addresses notice, limits ex parte TROs, and generally requires security in an amount the court considers proper. Federal Rule of Civil Procedure 65.

The Practical Framework

1. Identify the Right Legal Claim

A foreign competitor using a company’s brand, code, and customers may trigger several overlapping claims.

Brand misuse may support claims under the Lanham Act for trademark infringement, false designation of origin, unfair competition, or false advertising. The Lanham Act authorizes courts to grant injunctions to prevent violations of registered trademark rights and certain section 1125 violations. It also provides a rebuttable presumption of irreparable harm when the statutory standard is met. 15 U.S.C. § 1116.

Copied code may support copyright claims if the code is original and protected. The Copyright Act allows courts with jurisdiction over copyright actions to grant temporary and final injunctions to prevent or restrain infringement. 17 U.S.C. § 502.

Customer lists, source code, pricing, technical files, roadmaps, credentials, and confidential business data may support trade-secret claims if the information derives independent economic value from secrecy and reasonable secrecy measures were used. The Defend Trade Secrets Act allows injunctions to prevent actual or threatened misappropriation, and in extraordinary circumstances allows civil seizure to prevent dissemination of a trade secret. 18 U.S.C. § 1836.

2. Prove Jurisdiction Over the Foreign Defendant

A U.S. court cannot enter an enforceable injunction merely because the plaintiff is American or the harm is serious. The court must have personal jurisdiction or another lawful jurisdictional basis.

Important facts include:

• U.S. customers targeted by the foreign competitor;

• U.S. sales or subscriptions;

• U.S.-directed advertising;

• U.S. payment processors;

• U.S. servers or hosting;

• U.S. app-store listings;

• U.S. distributors or resellers;

• communications with U.S. customers;

• contracts with U.S. choice-of-law, forum, or consent-to-jurisdiction clauses;

• misappropriation from U.S.-based systems; and

• injury intentionally directed at a U.S. company or market.

Service also matters. Federal Rule of Civil Procedure 4 governs service, including service on foreign individuals and entities. For service abroad, Rule 4 recognizes internationally agreed means such as the Hague Service Convention and other court-approved methods where permitted. Federal Rule of Civil Procedure 4.

3. Fit the Case Within U.S. Law

Foreign conduct creates extraterritoriality issues. U.S. courts may not automatically apply U.S. statutes to every act that occurs abroad.

Trademark cases require special care after the Supreme Court’s decision in Abitron Austria GmbH v. Hetronic International, Inc. The Court held that the relevant Lanham Act provisions are not extraterritorial and extend only to claims involving domestic “use in commerce” of the mark. Abitron Austria GmbH v. Hetronic International, Inc..

For plaintiffs, that means the record should focus on domestic use, U.S.-directed sales, U.S. confusion, U.S. customer diversion, domestic advertising, domestic platform activity, or other U.S.-based conduct. A worldwide injunction may face challenge if it reaches foreign conduct beyond what U.S. law permits.

4. Prove the Injunction Factors

For a preliminary injunction, the plaintiff generally must show:

• likelihood of success on the merits;

• likelihood of irreparable harm without an injunction;

• that the balance of equities favors relief; and

• that the injunction is in the public interest.

The Supreme Court articulated the modern preliminary-injunction framework in Winter v. Natural Resources Defense Council. Winter v. NRDC.

For permanent injunctions, courts generally apply traditional equitable principles, including irreparable injury, inadequacy of legal remedies, balance of hardships, and public interest. eBay Inc. v. MercExchange, L.L.C..

In practical terms, a company should be prepared to prove:

• customer confusion;

• loss of control over brand reputation;

• copied code or substantial similarity;

• unauthorized use of confidential files;

• customer poaching based on misappropriated information;

• marketplace disruption;

• loss of goodwill;

• pricing harm;

• diversion of leads;

• difficulty measuring damages;

• threat of continued disclosure; and

• inability to claw back information once distributed.

Emergency Relief: When a TRO May Be Available

A temporary restraining order may be appropriate when waiting for a preliminary-injunction hearing would allow the competitor to cause immediate harm.

Examples include:

• imminent launch of a confusingly branded product;

• ongoing use of stolen source code;

• threatened disclosure of trade secrets;

• movement of servers, accounts, or domains;

• imminent customer migration based on stolen information;

• deletion of evidence;

• continued access to systems;

• unauthorized use of credentials;

• impending transfer of IP assets; or

• foreign movement of data beyond practical reach.

Rule 65 allows an ex parte TRO only in narrow circumstances. The moving party must provide specific facts showing immediate and irreparable injury before the other side can be heard, and counsel must certify efforts to give notice and why notice should not be required. Ex parte TROs generally expire within 14 days unless extended for good cause or consent. Federal Rule of Civil Procedure 65.

For trade secrets, the DTSA’s civil seizure remedy is even narrower and available only in extraordinary circumstances. It requires a detailed showing that other equitable relief would be inadequate, that immediate and irreparable injury will occur, and that other statutory requirements are met. 18 U.S.C. § 1836.

Evidence Needed to Support a U.S. Injunction

A strong injunction motion should be evidence-heavy. Useful evidence may include:

• trademark registrations;

• website screenshots;

• app-store listings;

• advertisements;

• domain records;

• social media posts;

• customer confusion evidence;

• declarations from customers or sales staff;

• source-code comparisons;

• Git logs, commits, repositories, and hash values;

• forensic reports;

• access logs;

• download logs;

• employee exit records;

• confidentiality agreements;

• customer-list access records;

• CRM exports;

• pricing files;

• email headers;

• support tickets;

• platform records;

• U.S. sales records;

• payment-processor records;

• customer diversion data;

• expert declarations;

• cease-and-desist correspondence;

• evidence of threatened deletion or concealment; and

• proposed injunction language.

The proposed order matters. Rule 65 requires injunctions to state reasons, state terms specifically, and describe the restrained or required acts in reasonable detail. Federal Rule of Civil Procedure 65.

Deadlines and Timing

Injunction cases move quickly. A business should evaluate:

• how soon the competitor will launch, sell, disclose, or transfer data;

• whether immediate notice would increase the risk of destruction or relocation;

• whether service abroad will delay the case;

• whether emergency service or alternative service is available;

• whether a bond must be posted;

• whether copyright registration is needed before filing suit;

• whether trade-secret limitations periods apply;

• whether a platform takedown should be pursued in parallel;

• whether a preservation letter should be sent;

• whether the case belongs in federal court; and

• whether a TRO, preliminary injunction, expedited discovery, or seizure request is necessary.

Under the DTSA, a civil action must generally be brought within 3 years after misappropriation is discovered or should have been discovered with reasonable diligence. 18 U.S.C. § 1836(d).

Key Risks

The main risks include:

• suing in a court without personal jurisdiction;

• seeking an overbroad worldwide injunction after Abitron;

• failing to prove domestic use in commerce for Lanham Act claims;

• failing to show irreparable harm;

• relying on conclusions instead of admissible evidence;

• failing to identify the specific code, trade secrets, or customer data at issue;

• seeking an injunction that is too vague to enforce;

• overlooking Rule 65 bond requirements;

• violating foreign service rules;

• failing to preserve forensic evidence;

• moving too slowly and weakening urgency;

• triggering a counterclaim for wrongful injunction; and

• failing to plan for appeal or stay proceedings.

Forum Issues: U.S. Federal Court, Florida, and North Carolina

Many brand, code, and trade-secret cases belong in federal court because they involve the Lanham Act, Copyright Act, DTSA, diversity jurisdiction, or related federal claims. Florida and North Carolina federal courts may also hear related state-law claims, including breach of contract, unfair competition, tortious interference, state trade-secret claims, and business torts.

The choice of forum should account for:

• defendant contacts;

• platform locations;

• witness locations;

• server locations;

• contract forum clauses;

• governing law;

• speed of emergency hearings;

• local rules;

• bond practice;

• appellate circuit law;

• enforceability abroad; and

• whether the injunction must reach U.S. intermediaries.

If the competitor operates through U.S. platforms, payment processors, resellers, or affiliates, the plaintiff should analyze who can be named, who can be served, and who may be bound under Rule 65(d) as a party, officer, agent, employee, attorney, or person acting in active concert with a bound person who receives actual notice. Federal Rule of Civil Procedure 65(d).

Appeal Consequences

Injunction orders can create immediate appellate consequences. Orders granting, denying, modifying, or dissolving injunctions may be appealable under federal appellate law, and a party may seek a stay or modification pending appeal.

The losing party may challenge:

• personal jurisdiction;

• service;

• likelihood of success;

• irreparable harm;

• bond amount;

• overbreadth;

• extraterritorial reach;

• specificity under Rule 65(d);

• trade-secret identification;

• copyright ownership;

• trademark validity;

• customer confusion evidence; and

• whether the injunction improperly restrains lawful competition.

The moving party should draft the record for appeal from the start. That means clear declarations, authenticated exhibits, precise findings, narrowly tailored relief, and a proposed order that can survive appellate review.

Authority Block

Key authorities include:

• Federal Rule of Civil Procedure 65, governing TROs, preliminary injunctions, security, order specificity, and persons bound.

• Federal Rule of Civil Procedure 4, governing service of process, including service abroad.

• 15 U.S.C. § 1116, authorizing Lanham Act injunctive relief.

• 17 U.S.C. § 502, authorizing copyright injunctions.

• 18 U.S.C. § 1836, authorizing DTSA civil actions, injunctions, and extraordinary civil seizure relief.

• Winter v. Natural Resources Defense Council, stating the preliminary-injunction standard.

• eBay Inc. v. MercExchange, L.L.C., applying traditional equitable principles to permanent injunctions.

• Abitron Austria GmbH v. Hetronic International, Inc., limiting Lanham Act claims to domestic infringing use in commerce.

How Biazzo Law Approaches Cross-Border Injunctions

Biazzo Law approaches cross-border brand, code, and customer-diversion disputes with an injunction-ready and appellate-aware strategy. That means identifying the right claims, proving domestic conduct, preserving forensic evidence, preparing a Rule 65 record, tailoring relief, and anticipating jurisdiction, service, bond, stay, and appeal issues before filing.

The firm’s litigation and appellate practice covers Florida, North Carolina, and federal courts. Biazzo Law brings trial strategy, injunction readiness, state and federal appellate experience, and a Supreme Court and amicus lens to disputes where foreign competitors, IP misuse, and U.S. market harm intersect.

Internal Links

Learn more about business and civil litigation.

Related posts:

• When should appellate counsel participate in an injunction hearing?

• How is an injunction bond set, challenged, or increased?

To discuss emergency injunctions, cross-border enforcement, or appellate risk, visit Biazzo Law’s contact page.

FAQ

Can a U.S. court enjoin a foreign company?

Yes, if the court has jurisdiction, the defendant is properly served or otherwise before the court, U.S. law applies, and the injunction standard is met.

Can a U.S. court stop a foreign competitor from using my trademark abroad?

Not automatically. After Abitron, Lanham Act claims generally require domestic infringing use in commerce. A worldwide injunction may be vulnerable if it reaches foreign conduct beyond U.S. law.

Can copied software code support an injunction?

Yes. Copied code may support copyright and trade-secret injunctions if ownership, protectability, copying or misappropriation, and irreparable harm are shown.

Can customer lists be trade secrets?

They can be, if they derive economic value from not being generally known and the company used reasonable measures to keep them secret.

Can the court order platforms or affiliates to stop helping the foreign competitor?

Possibly. Rule 65 can bind parties and people acting in active concert with them who receive actual notice. But the order must be specific and legally supported.

Is an emergency TRO available without notice?

Sometimes, but only in narrow circumstances. Rule 65 requires specific facts showing immediate irreparable harm before the adverse party can be heard and a written certification about notice efforts.

Will the plaintiff need to post a bond?

Usually, yes. Rule 65(c) generally requires security for a TRO or preliminary injunction in an amount the court considers proper.

What should a company do first?

Preserve evidence, document U.S.-directed conduct, secure forensic records, identify the legal claims, evaluate service and jurisdiction, and prepare an injunction record quickly.

Schedule a Litigation Strategy Review

If a foreign competitor is using your brand, code, customer data, or U.S. market relationships, delay can make the harm harder to stop. Schedule a litigation strategy review with Biazzo Law to evaluate jurisdiction, emergency injunction options, evidence preservation, platform strategy, bond issues, and appeal risks.