California, United States of America
The following excerpt is from Angell v. Rowlands, 149 Cal.Rptr. 574, 85 Cal.App.3d 536 (Cal. App. 1978):
The other line of case authority is based on Cavanaugh v. Casselman (1891) 88 Cal. 543, 26 P. 515, which holds that an agreement is valid without the signature of all the parties purportedly bound by the agreement Unless there is an express intention indicated that there will be no binding contract if all parties do not sign.
The above passage should not be considered legal advice. Reliable answers to complex legal questions require comprehensive research memos. To learn more visit www.alexi.com.