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What is a Non-Disclosure Agreement (NDA)?

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The Daily Ledger · Markets

Before the demo, their lawyers sent over a non-disclosure agreement for everyone in the room to sign.

The reader highlighted one clause — on the page or in a PDF. Clicked made the legal term “non-disclosure agreement” easy to understand:

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Overview

A non-disclosure agreement, or NDA, is a contract in which one or both sides promise to keep specified information secret. It covers only what it defines as confidential, not everything you ever learn. And it cannot physically stop a leak. What it does is attach a legal price to leaking: a lawsuit for the damage done, or for an amount the contract fixed in advance.
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Overview

An NDA is "this stays between us" rewritten by lawyers. Sign one and you are allowed to know the secret. What you are not allowed to be is the person at the party leaning in with "okay, you did not hear this from me." Nothing physically stops you talking. The contract simply makes sure that if the secret gets out through you, the lawsuit arrives with your name on it. 😎

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Detail

A non-disclosure agreement is a contract that names certain information as confidential and puts a legal price on repeating it. Deals need one because a buyer cannot value a company without opening its books; jobs need one because employees see internal plans every day. The signing can even come after the telling: plenty of NDAs are signed mid-conversation and reach back to cover what was already shared. What the agreement cannot do is stop a leak physically. Once told, a secret cannot be untold, so the remedy is a lawsuit, not a lock. The definition section does the real work. Anything already public, anything you learned elsewhere before they told you, and anything you develop on your own sits outside it, and a well-drafted NDA says so. Some bind one side, some bind both, and many expire after a set number of years. Courts will not enforce one against reporting a crime. And the general skills you carry to your next job stay yours, which is what separates it from a non-compete: that one restricts where you work, not what you repeat.
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Detail

An NDA is a contract that lets someone show you a secret while keeping the right to sue you for spreading it. You have probably signed more of them than you remember, because they hide in onboarding paperwork between the tax forms, and nobody reads those either. Here is what the movies get wrong: signing does not install a filter in your head. The company cannot take back what you know, cannot hear what you whisper, and often learns about a leak the way everyone else does, after it is public. What it can do is sue, and that is enough. An NDA works the way a burglar alarm sticker works, mostly by existing. The fine print matters more than the signature: a decent one lists exactly what counts as secret, leaves you anything already public or anything you knew from somewhere else first, and expires. And no court will hold you to one for reporting a crime, whatever the paperwork implies. 😎

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Analogy

An NDA works like the arrangement between a magician and a new assistant. The trick has to be taught before the show, there is no way around that, so the assistant signs a promise never to reveal how it is done. Years later the assistant can quit, join a rival act, and use every bit of stagecraft picked up along the way. The one thing that stays behind is the trick. And if it shows up in a tell-all interview, the magician does not get the secret back; the assistant gets the bill.
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Analogy

An NDA runs on early-screening rules. Critics get to watch the film weeks before release, because reviews take time to write, and in exchange they agree not to spill the ending. Nobody confiscates their memory of the plot. The deal is simply that spoiling it early costs them, in lawsuits and in never being invited back. And once the film is out, the embargo dies on its own, which is exactly how a good NDA behaves: secrecy with an expiry date, not a life sentence. 😎
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AI explanations may contain errors · Not professional advice

Formal definition — The same term, explained the usual way

A non-disclosure agreement is a contract establishing a confidential relationship between parties, under which a receiving party undertakes not to disclose or misuse information designated as confidential by a disclosing party. Such agreements may be unilateral or mutual, ordinarily specify the scope and duration of the obligation, and commonly exclude information that is publicly available, previously known to the recipient, or independently developed. Remedies for breach include damages and injunctive relief; provisions purporting to bar reports of unlawful conduct to authorities are generally unenforceable.

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