Introduction
Non-Disclosure Agreements (NDAs) are critical tools for protecting confidential information in business relationships. Among their various provisions, residuals clauses address the complex issue of knowledge that remains in the unaided memory of individuals after exposure to confidential data. This practice note explains what residuals clauses are, their practical effects, and how different legal systems approach their enforceability.
Meaning of Residuals in NDAs
- Definition: Residuals are non-tangible knowledge retained in memory (not written down or copied) after reviewing confidential information.
- Purpose: They recognize that employees inevitably absorb skills, techniques, or concepts when working with disclosed information.
- Clause Effect: A residuals clause excludes such remembered knowledge from the definition of “Confidential Information,” giving the receiving party limited rights to use it.
Rights of the Receiving Party
- Permitted Use: Residuals clauses may allow the receiving party to use remembered knowledge for future projects, provided it is not a direct reproduction of trade secrets.
- Restrictions: Typically, residuals cannot include:
- Source code
- Proprietary formulas
- Highly sensitive trade secrets
- Balance of Interests: The receiving party gains freedom to continue innovating, while the disclosing party risks losing exclusivity if residuals are too broadly defined.
Treatment Across Jurisdictions
| Jurisdiction | Approach to Residuals | Key Notes |
| United States | More common; enforceable if clearly drafted | Courts may uphold residuals clauses, but trade secret law (UTSA, DTSA) limits use of memorized secrets. Companies often negotiate carve-outs (e.g., excluding source code). |
| United Kingdom | Generally cautious | Courts emphasize protecting trade secrets. Residuals clauses are rare and often resisted, as they risk undermining confidentiality obligations. |
| European Union | Restrictive | EU Trade Secrets Directive treats any unauthorized use—even from memory—as misappropriation. Residuals clauses may conflict with mandatory protections. |
| South Africa | Conservative stance | Confidential information is broadly protected under common law. Residuals clauses are unusual and may be unenforceable if they undermine trade secret protections. |
| Switzerland/Germany | Strong protection | Courts prioritize the discloser’s rights; residuals clauses are rarely accepted unless narrowly tailored. |
Risks & Practical Considerations
- For Disclosers: Residuals clauses can dilute protection of trade secrets. Risk of “backdoor” use of confidential information.
- For Receivers: Without residuals, they risk being accused of misuse for applying general know-how gained during collaboration.
- Negotiation Strategy:
- Narrowly define residuals (exclude sensitive categories).
- Limit eligible personnel.
- Require safeguards (e.g., no deliberate memorization).
- Align with local trade secret law.
Bottom Line
Residuals clauses are a legal compromise between protecting confidential information and recognizing the inevitability of human memory. They are more accepted in U.S. practice but face skepticism or outright rejection in Europe and South Africa. For cross-border contracts, parties must carefully tailor residuals clauses to local law and negotiate carve-outs to avoid undermining trade secret protections.
References and Further Information
- https://www.farrer.co.uk/globalassets/news-articles/downloads/remember-remember-residuals-clauses-in-ndas–risks-and-how-to-manage-them.pdf
- https://www.howtocontract.com/nda/residual-information-clause
- https://aaronhall.com/understanding-residuals-clause-confidentiality-agreements/
- https://www.everynda.com/blog/beware-residuals-clauses-nda/
Disclaimer
This practice note is for informational purposes only and does not constitute legal advice. Readers should consult qualified legal professionals for advice tailored to their specific circumstances.