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- An NDA is a contract that limits sharing of defined information
- NDAs are commonly written as one way or mutual agreements
- Enforceability often depends on state contract law basics
- Trade secret law is a major reason businesses use NDAs
- Federal law can limit how some nondisclosure clauses are enforced
- State law differences can matter for what an NDA can cover
- Common NDA disputes often focus on definitions and proof
- Enforcement usually follows ordinary civil contract and trade secret processes
- Sources
Key Facts
- Federal and state: A nondisclosure agreement is generally treated as a contract, and enforceability commonly depends on both general contract rules and specific confidentiality laws.
- State level: Most NDA enforceability questions are governed by state contract law, which can differ on issues like scope, remedies, and public policy limits.
- Federal level: The Speak Out Act limits court enforcement of certain predispute nondisclosure and nondisparagement clauses for sexual assault and sexual harassment disputes.
- Federal level: Federal trade secret law includes a whistleblower immunity provision that can affect how some confidentiality obligations are written and enforced.
- Federal and state: NDAs are often used to protect trade secrets and other confidential business information, but “trade secret” and “confidential” are not always identical categories.
- Federal level: Federal labor law protects certain employee communications about workplace conditions, which can affect how broad employment NDAs can be.
- Federal and state: Many NDA disputes turn on how the agreement defines the covered information and whether the alleged disclosure fits that definition.
- State level: State law can affect whether a court may grant remedies like damages or an injunction for a claimed NDA breach.
As of February 2026, the federal statutes discussed below are current, but state laws and court interpretations can change over time.
An NDA is a contract that limits sharing of defined information
A nondisclosure agreement, often called an NDA or non disclosure agreement, is a contract where parties agree that certain information will remain confidential, and an alleged unauthorized disclosure is usually treated as a possible breach of contract.
In business settings, an NDA agreement typically focuses on information that is not public and that a business wants to keep private, such as trade secrets, client information, or negotiation details.
NDAs are commonly written as one way or mutual agreements
Some NDAs are written so that only one party is sharing confidential information (sometimes called a one way NDA), while other NDAs are mutual and require both parties to keep certain shared information confidential.
Even when two agreements are both called “NDAs,” the practical effect can differ a lot because the definition of confidential information, the allowed uses, the time period, and the remedies can be written very differently.
Enforceability often depends on state contract law basics
In the United States, most contract law is state law, and courts commonly look to basic contract concepts such as mutual assent, consideration, capacity, and legality when evaluating whether a confidentiality contract is enforceable.
Because contract law is primarily state-based, two similar NDAs can be treated differently in different states depending on local statutes and court decisions.
Trade secret law is a major reason businesses use NDAs
Many NDAs are designed to support trade secret protection by showing that the business took reasonable steps to keep certain valuable information secret, which is often a key concept in trade secret law.
For context on state law, Cornell’s Legal Information Institute explains that, as of 2024, 48 states, the District of Columbia, the U.S. Virgin Islands, and Puerto Rico have adopted versions of the Uniform Trade Secrets Act, but details can still vary by jurisdiction.
Federal law can limit how some nondisclosure clauses are enforced
The federal Speak Out Act provides that certain predispute nondisclosure and nondisparagement clauses are not judicially enforceable for covered sexual assault or sexual harassment disputes in specified circumstances under 42 U.S.C. § 19403.
Separately, federal trade secret law includes a whistleblower immunity framework and a related notice concept in 18 U.S.C. § 1833, which can be relevant when an NDA governs trade secrets or other confidential information in an employment or contractor relationship.
In workplace settings, broad confidentiality language can also raise issues under federal labor law, because employees have statutory rights to engage in certain “concerted activities” for mutual aid or protection under 29 U.S.C. § 157.
State law differences can matter for what an NDA can cover
State laws vary significantly on how courts interpret and enforce confidentiality terms, including how a court evaluates whether a restriction is too broad, unclear, or against public policy.
State law can also affect available remedies, including how damages are measured in a breach of contract case and when a court may order injunctive relief to limit further disclosure.
Common NDA disputes often focus on definitions and proof
In disputes, parties often disagree about whether the information at issue fits the agreement’s definition of confidential information, and whether the information was already known, independently developed, or otherwise outside the contract’s scope.
Another common issue is proof, because confidentiality disputes frequently depend on records showing what was shared, when it was shared, how it was marked or handled, and what was later disclosed.
Enforcement usually follows ordinary civil contract and trade secret processes
NDA disputes are commonly raised as breach of contract claims, sometimes alongside trade secret or unfair competition claims, depending on the facts and the state law used.
Some agreements include arbitration provisions or court selection clauses, and the enforceability of those provisions can depend on contract language and the law that applies to the dispute.
