California Codes

Cal. Civil Code § 1580 (2026)

✓ current as of May 2026
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Consent is not mutual, unless the parties all agree upon the same thing in the same sense. But in certain cases defined by the Chapter on Interpretation, they are to be deemed so to agree without regard to the fact.

Notes of Decisions
Cited in 79 cases (32 in the last 5 years), 1944–2026 · leading case: Monster Energy Co. v. Schechter, 444 P.3d 97 (Cal. 2019).
Monster Energy Co. v. Schechter, 444 P.3d 97 (Cal. 2019). “] An essential element of any contract is 'consent.' [Citations.”
Weddington Prods., Inc. v. Flick, 98 Cal. Daily Op. Serv. 218 (Cal. Ct. App. 1998). · cites it 2× “” (Civ. Code, § 1580; see also Civ. Code, § 1636 [contracts must be enforced according to the “mutual intention of the parties as it existed at the time of contracting.”
T. M. Cobb Co. v. Superior Court, 682 P.2d 338 (Cal. 1984). · cites it 2× “" (Civ. Code, § 1580.) "The existence of mutual consent is determined by objective rather than subjective criteria, the test being what the outward manifestations of consent would lead a reasonable person to believe.”
Bustamante v. Intuit, Inc., 2006 Cal. Daily Op. Serv. 6227 (Cal. Ct. App. 2006). “” (Civ. Code, § 1580; see also §§ 1550, 1565.”
Avery v. Integrated Healthcare Holdings CA4/3, 218 Cal. App. 4th 50 (Cal. Ct. App. 2013). “] If there is no evidence establishing a manifestation of assent to the ‘same thing’ by both parties, then there is no mutual consent to contract and no contract formation.”
Fair v. Bakhtiari, 147 P.3d 653 (Cal. 2006). · cites it 2× “] [¶] `The existence of mutual consent is determined by objective rather than subjective criteria, the test being what the outward manifestations of consent would lead a reasonable person to believe.' [Citation.] Outward manifestations thus govern the finding of mutual consent…”
Kum Tat Ltd. v. Linden Ox Pasture, LLC, 845 F.3d 979 (9th Cir. 2017). “3d 692, 698 (2006) (quoting Cal. Civ. Code § 1580 ). The district court did not clearly err in interpreting Kum Tat’s “review and approve” clause in its counter-offer and its subsequent request for a $500,000 price reduction as showing an absence of mutual consent, rather than…”
Lindsay v. Lewandowski, 2006 Cal. Daily Op. Serv. 4665 (Cal. Ct. App. 2006). · cites it 2× “2d 265 ; Civ.Code, § 1580 ["Consent is not mutual, unless the parties all agree upon the same thing in the same sense"]; Civ.”
Rockridge Trust v. Wells Fargo, N.A., 985 F. Supp. 2d 1110 (N.D. Cal. 2013). “3d 692 (2006) (quoting Cal. Civ.Code §§ 1580, 1550, 1565). Second, “[u]nder California law, a contract will be enforced if it is sufficiently definite .”
Foster Poultry Farms v. Alkar-Rapidpak-MP Equip., Inc., 868 F. Supp. 2d 983 (E.D. Cal. 2012). “” Cal. Civ.Code § 1580; Bustamante v. Intuit, Inc.”
Khajavi v. Feather River Anesthesia Med. Grp., 2000 Cal. Daily Op. Serv. 8323 (Cal. Ct. App. 2000). ““One of the essential elements of a contract is the consent of the parties.”
Bowers v. Raymond J. Lucia Companies, 206 Cal. App. 4th 724 (Cal. Ct. App. 2012). “; Civ. Code, §§ 1580, 1636.) “ ‘The existence of mutual consent is determined by objective rather than subjective criteria, the test being what the outward manifestations of consent would lead a reasonable person to believe.”
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