Whether shrink-wrap licenses are legally binding differs between jurisdictions,
though a majority of jurisdictions hold such licenses to be enforceable. At particular issue is the difference in opinion between the courts in
Klocek v. Gateway and
Brower v. Gateway. Both cases involved a shrink-wrapped license document provided by the online vendor of a computer system. The terms of the shrink-wrapped license were not provided at the time of purchase, but were rather included with the shipped product as a printed document. The license required the customer to return the product within a limited time frame if the license was not agreed to. In
Brower, the Supreme Court of New York ruled that the terms of the shrink-wrapped license document were enforceable because the customer's assent was evident by its failure to return the merchandise within the 30 days specified by the document. The U.S. District Court of Kansas in
Klocek ruled that the contract of sale was complete at the time of the transaction, and the additional shipped terms contained in a document similar to that in
Brower did not constitute a contract, because the customer never agreed to them when the contract of sale was completed.