A non-disclosure agreement is one of the most commonly used legal documents in business — and one of the most commonly misunderstood. Business owners sign NDAs before vendor meetings, investor pitches, partnership discussions, and product development conversations without always understanding what protection they are actually getting, what obligations they are taking on, or whether the agreement in front of them is worth the paper it is printed on. An NDA that is drafted carelessly, negotiated without attention to its key provisions, or signed without understanding its limits may provide far less protection than the parties assume.
This section covers NDA law comprehensively — from the fundamental question of what an NDA is and when you need one through the drafting details that determine whether an agreement is enforceable, the strategic considerations that vary by context and industry, and the practical steps for enforcing an NDA when it is breached. The pages here also cover demand letters, which are often the first step in enforcing any business obligation — including an NDA — and which follow their own set of strategic and legal considerations.
What an NDA Does and Does Not Protect
An NDA creates a contractual obligation of confidentiality — the receiving party agrees not to disclose the disclosing party’s confidential information and not to use it for purposes outside the scope of the parties’ business relationship. But the protection an NDA provides is only as strong as how confidential information is defined, what exclusions apply, what remedies are available for breach, and whether the agreement would actually be enforced by a court in the relevant jurisdiction. Information that is already publicly known, independently developed by the receiving party, or received from a third party without restriction typically falls outside the NDA’s protection regardless of what the agreement says. Understanding these limits is essential for both drafting and relying on an NDA.
Mutual vs. One-Sided NDAs
A unilateral NDA protects one party’s information — the disclosing party receives protection and the receiving party takes on obligations. A mutual NDA protects both parties, which makes sense when both sides will be sharing sensitive information in the course of a business discussion. The choice between mutual and one-sided is often a point of negotiation: the party sharing more sensitive information typically wants a one-sided agreement, while the other party typically prefers mutual protection as a matter of principle even if it has less to protect. Understanding when to push for reciprocity — and when a mutual NDA creates unintended obligations — is a practical skill for any business owner who regularly negotiates confidentiality agreements.
NDAs in Specific Business Contexts
The right NDA for a preliminary investor meeting is different from the right NDA for a product development relationship with a contractor, which is different again from the right NDA for a joint venture or a merger due diligence process. Each context involves different categories of sensitive information, different durations of the confidential relationship, different remedies for breach, and different risks of overreaching that could make a potential counterparty walk away. Venture capitalists routinely decline to sign NDAs before preliminary meetings with founders — not because they are acting in bad faith but because signing NDAs with hundreds of companies creates conflicts that are impossible to manage. Understanding why and having a framework for when to insist on an NDA versus when to proceed without one is a judgment that every founder and business owner needs to develop.
Demand Letters
A demand letter is a formal written communication — typically from a lawyer or a business on its own behalf — that demands a specific action from the recipient, warns of legal consequences if that action is not taken, and creates a record that the sender made a good-faith attempt to resolve a dispute before litigation. Demand letters are used in NDA breaches, contract disputes, unpaid invoices, intellectual property infringement, employment disputes, and almost every other area of commercial conflict. They can be powerful tools for resolving disputes efficiently — or they can backfire if they are sent prematurely, drafted poorly, or used in situations where they signal weakness rather than strength. This section covers both offensive demand letters, designed to compel action or payment, and defensive responses to demand letters you receive.
What This Section Covers
The pages in this section cover NDA law from first principles through advanced topics: what an NDA is and when you need one, core NDA provisions, drafting best practices and common mistakes, mutual versus one-sided agreements, duration and termination, defining confidential information, exclusions and carveouts, governing law and jurisdiction, remedies and enforcement, California NDA law and its unique restrictions, NDAs for startups and founders, NDAs in M&A due diligence, independent contractor and vendor NDAs, joint venture NDAs, trade secret law and how NDAs interact with it, patent strategy and NDAs, NDA breach and how to sue for it, and a comprehensive treatment of demand letters — what they are, when to send them, how to write them, and how to respond when you receive one.