Mutual Non-Disclosure Agreement (NDA)

Overview

A mutual non-disclosure agreement (NDA) is a contract under which two parties each agree to protect confidential information disclosed by the other. Unlike a one-way NDA (used where only one party discloses sensitive information), a mutual NDA is appropriate where both sides will share confidential material — for example during exploratory business discussions, a potential joint venture, or due diligence ahead of a transaction. English law does not have a single statute governing confidentiality; protection derives from the contractual obligations set out in the NDA itself, together with the general equitable action for breach of confidence (originating in cases such as Coco v A N Clark (Engineers) Ltd [1969]), which can apply even without a written contract but is considerably harder to enforce without one. When to use it: before sharing sensitive business, technical, financial or commercial information with another party where both sides will be disclosing information — for instance, initial partnership talks, supplier evaluation, or investment discussions. Parties: two parties, each acting in the dual capacity of "Discloser" and "Recipient" depending on which information is being shared. Key clauses: a clear definition of "Confidential Information" (broad enough to capture what matters, but with standard carve-outs for information already public, already known to the recipient, independently developed, or required to be disclosed by law or regulator), the permitted purpose for which the information may be used, obligations of confidentiality and limits on onward disclosure (e.g. to employees and advisers on a need-to-know basis, bound by equivalent obligations), the duration of the confidentiality obligation (commonly 2 to 5 years from disclosure, though trade secrets may warrant an indefinite obligation), and provisions on return or destruction of confidential material on request or termination. Interaction with trade secrets law: since 2018, the Trade Secrets (Enforcement, etc.) Regulations 2018 (implementing the EU Trade Secrets Directive, retained in UK law post-Brexit) give additional statutory protection to information meeting the definition of a "trade secret" (secret, having commercial value because it is secret, and subject to reasonable steps to keep it secret) — a well-drafted NDA is itself strong evidence of the "reasonable steps" required for that protection to apply. Common pitfalls: a definition of confidential information so broad it is unenforceable or so narrow it fails to cover what actually matters; no carve-out for legally required disclosures, which can create a false conflict with regulatory or court obligations; forgetting that an NDA does not itself transfer or licence any intellectual property — a separate licence or assignment is needed if information will be used to create new IP; and using a mutual NDA in what is actually a one-way disclosure situation, needlessly obliging the party that discloses nothing.