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What Makes a Non-Disclosure Agreement Legally Enforceable? 

William B. Hanley, Attorney at Law June 30, 2025

In today’s interconnected business world, confidentiality is invaluable. Whether you’re building a startup, hiring freelancers, or negotiating partnerships, safeguarding sensitive information is critical to your business's success.

Non-disclosure agreements (NDAs) serve as a shield to protect sensitive information and prevent it from falling into the wrong hands. However, the big question remains: what makes a non-disclosure agreement (NDA) legally enforceable? 

William B. Hanley, Attorney at Law, is experienced in handling business cases, including those involving non-disclosure agreements. This blog explores the essentials of enforceable NDAs, key considerations under California law, and how an attorney can help protect your business interests. 

Understanding Non-Disclosure Agreements

A non-disclosure agreement (NDA) is a legally binding contract that protects confidential information from unauthorized disclosure. Typically, NDAs are used in business relationships where sensitive information is shared, such as trade secrets, financial data, or intellectual property. The agreement defines the business's parameters for confidential information and sets the terms under which it can be used or disclosed. 

Key Elements of an Enforceable NDA 

In California, non-disclosure agreements are enforceable under the law, provided they meet specific legal criteria. While an NDA may include additional elements depending on the business needs, the essential parts of an NDA typically include the following.

  • Identifiable parties: The agreement must define who is bound by its terms. This usually includes the disclosing party (the one sharing information) and the receiving party (the one obligated to keep the information confidential). 

  • Specific definition of confidential information: The NDA must specify what information is considered confidential. The use of vague or overly broad classifications can render the agreement unenforceable. 

  • Purpose for disclosure: The contract should specify why the confidential information is being shared. For example, it may be used to evaluate a potential partnership or perform a specific job. 

  • Duration of confidentiality: The NDA should include a clear timeline for how long the receiving party must keep the information confidential. Depending on the nature of the information, this could range from a few years to an indefinite period. 

  • Clear obligations and restrictions: The NDA should articulate what the receiving party can and cannot do with the confidential information. It may explicitly prohibit sharing the information with third parties or reverse engineering proprietary technology. 

  • Exclusions to confidentiality: Most NDAs include specific situations where confidentiality obligations are waived or exempt. Standard exceptions include publicly available information or information obtained through lawful means from sources outside the scope of the agreement. 

  • Legal recourse for breaches: An enforceable NDA includes the consequences of violating the agreement. Remedies could include monetary damages, injunctions, or other legal actions. 

Why NDAs Can Be Challenged in Court 

While NDAs are required to meet strict criteria to be enforceable in court, even the most meticulously drafted NDAs can still face legal challenges. Some common reasons a court of law may refuse to enforce an NDA include the following.

  • Overly broad language: An NDA that attempts to protect generic or overly broad categories of information may be ruled unenforceable. Courts tend to favor agreements that specifically identify what information qualifies as confidential. 

  • Unreasonable restrictions: NDAs that impose unfair or overly burdensome obligations on the receiving party are often contested. For instance, an agreement that prohibits an individual from discussing knowledge that is already publicly available is unlikely to be upheld. 

  • Lack of consideration: A legally binding NDA requires fair consideration. This means that the receiving party must get something in return for agreeing to the confidentiality obligations, such as employment, compensation, or access to valuable information. 

  • Violation of public policy: NDAs that attempt to enforce unlawful restrictions or disguise other prohibited actions, such as non-compete clauses in California, are invalid. 

California Laws Governing NDAs

California has specific regulations governing confidentiality agreements, especially in the context of employment and trade secret protection. The primary laws and regulations that California businesses should be aware of when drafting or signing NDAs include the following.

California Uniform Trade Secrets Act (CUTSA) 

The California Uniform Trade Secrets Act (CUTSA) establishes the legal foundation for safeguarding trade secrets within the state. An NDA aimed at protecting trade secrets must comply with CUTSA’s definition of a trade secret, which includes information that derives economic value from being secret and is subject to reasonable efforts to maintain its secrecy. 

Restrictions on Non-Compete Clauses 

California has stringent rules against non-compete agreements. While NDAs can bar employees or contractors from disclosing proprietary information, they cannot unlawfully restrict their employment opportunities or otherwise infringe upon their rights. NDAs must avoid resembling non-compete clauses, which are largely unenforceable under California Labor Code Section 16600. 

California’s “Silenced No More Act” 

Signed into law in 2021, the Silenced No More Act (SB 331) restricts the use of NDAs in cases involving workplace harassment, discrimination, and other unlawful acts. This law protects individuals from being silenced by non-disclosure agreements (NDAs), allowing them to speak out about illegal behavior they have experienced or witnessed. 

Reasonableness of Terms 

California courts evaluate the “reasonableness” of an NDA’s scope. Unrealistic or overly broad terms may be deemed unenforceable; therefore, NDAs should be carefully tailored to the specific circumstances. It's essential to consult with an experienced attorney familiar with California laws to ensure that your NDA aligns with state requirements and is clearly drafted to stand up in court. 

Non-Disclosure Attorney Serving Irvine and Newport Beach, California

For over 40 years, William B. Hanley, Attorney at Law, has dedicated his practice to resolving disputes and protecting his clients' business interests. Widely recognized as one of California's leading civil trial attorneys, he boasts an impressive record of success, earning numerous awards and delivering exceptional results.  

Whether you’re facing a challenging NDA issue or involved in business litigation, turn to William B. Hanley, Attorney at Law, for reliable legal advocacy. Located in Newport Beach, California, the firm serves clients throughout the state, including Irvine, Orange County, Los Angeles County, and San Diego County. Reach out today to schedule a consultation.