Agreement by mail law case

You're referring to the landmark case of "Agreement by Mail" in the context of contract law!

The case you're likely thinking of is "Lefkowitz v. Great Minneapolis Surplus Stores, Inc." (1956), which was a significant decision in the United States Supreme Court. Here's a brief summary:

Facts:

Issue:

Decision:

Impact:

In summary, the Lefkowitz case confirmed that an agreement by mail, where the acceptance is sent by mail, is enforceable as long as the acceptance is received by the offeree within a reasonable time, and that the signature of the authorized representative is not a necessary condition for the validity of the contract.