86 F.3d 1447 (7th Cir. 1996)
ProCD v. Zeidenberg is a landmark case in contract law that addresses the enforceability of shrinkwrap licenses, a common practice in software distribution.
Is a shrinkwrap license enforceable as a contract when the terms are presented after the purchase of the product?
The court held that shrinkwrap licenses can be enforceable contracts if the terms are made available to the user and the user has the opportunity to accept or reject those terms. The court emphasized the importance of mutual assent in contract formation, noting that acceptance can occur through conduct, such as using the software after being made aware of the terms. This principle aligns with the broader contract law doctrine that allows for agreements to be formed through actions as well as explicit verbal or written consent.
The Seventh Circuit reversed the district court's decision, ruling in favor of ProCD. The court determined that the shrinkwrap license was enforceable and that Zeidenberg had accepted the terms by using the software. The court reasoned that the terms were adequately communicated and that the user had the opportunity to reject them by not using the product. Therefore, Zeidenberg was liable for breaching the contract by distributing the software without authorization.
ProCD v. Zeidenberg is a foundational case in the realm of contract law, particularly concerning electronic agreements and shrinkwrap licenses. It established critical precedents regarding the enforceability of licenses in the digital age, influencing how courts view user agreements and the concept of acceptance through conduct. The case has been cited in numerous subsequent decisions, reinforcing the idea that electronic contracts can be valid and enforceable, provided that users are given a reasonable opportunity to review and accept the terms.