Written by attorneys · grounded in primary & secondary sources — see below
An outward expression by a party of willingness to enter into a bargain on particular terms. The expression is judged objectively by whether a reasonable person would understand it as agreement rather than by any hidden subjective intent.
Sources & Authorities
How it applies
Common Examples
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Conditional Reply Creates Counteroffer
Miles Montgomery offered to sell equipment to Marcus Mitchell for a fixed price. Marcus replied that he accepted only if Miles also included free delivery. Because the reply conditioned acceptance on an added term, no contract formed and Miles remained free to sell elsewhere.
Additional Terms Still Form Contract
Metro Bank sent a purchase order for software to Magnolia Foods. Magnolia replied with a confirmation adding a warranty clause. The confirmation operated as acceptance even with the new term, so a contract existed between the parties.
Select any source to read its text and confirm it supports the definition.
Cases
Federal Rules
Uniform Acts
Model Codes
Restatements
Casebooks
Study Supplements
Miguel Mendoza and Maurice Marshall signed an operating agreement before forming Momentum Capital LLC. Their outward expressions of assent to the terms bound the company even though the entity itself never signed, creating an enforceable agreement.
New Partner Deemed to Assent
Michael Miller joined an existing limited partnership. Upon admission his acceptance of partner status manifested assent to the existing partnership agreement even though he had never read or signed it.
General Partnership Admission Binds Partner
Ming Ma became a partner in a general partnership after the original partners admitted her. Her joining constituted manifestation of assent to the existing partnership agreement without any separate expression of agreement.
Consent Limits Self-Defense Privilege
Marcus Mitchell manifested assent to a particular medical procedure by signing the consent form. When the provider later attempted an additional unscheduled injection, Marcus retained the right to defend himself because the new contact fell outside the scope of his assent.
Common questions
Frequently Asked
5
Does manifestation of assent require subjective intent to be bound?+
No. Contract law applies an objective standard. A reasonable person’s understanding of the outward words or conduct controls, not any secret intention the party may have held.
Supporting sources
When does a reply containing additional terms fail to show manifestation of assent?+
A reply fails to show assent when it expressly conditions acceptance on the offeror’s agreement to the new or different terms. In that situation the reply operates as a counter-offer rather than an acceptance.
Supporting sources
How does the UCC change the common-law rule on additional terms in acceptance?+
Under the UCC a definite and seasonable expression of acceptance operates as an acceptance even though it states additional or different terms, unless acceptance is expressly made conditional on assent to those terms.
Supporting sources
Are new members of an LLC or partnership bound by the operating or partnership agreement?+
Yes. A person who becomes a member or partner is deemed to assent to the governing agreement even without actual review or signature.
Supporting sources
Does prior consent to one bodily contact allow self-defense against a different contact?+
No. Consent to a particular contact removes the privilege of self-defense only for that contact. The actor retains the normal privilege against any invasion outside the scope of the assent given.
Supporting sources
557 P.2d 106 (Cal. 1976)Property
…in fact, as distinguished from quasi-contractual obligations, are express contracts, differing only in the manner in which the assent of the parties is expressed and proved. (See 46 Cal.2d at pp. 735-736.) [^maj-17]: The Court of Appeal opinion in In re Marriage of Cary, supra, does not explain why Paul Cary filed his…