7.03.050 Acceptance Different from Offer; Counteroffer

A definite expression of acceptance or a written confirmation which is sent within a reasonable time operates as an acceptance even though it states terms additional to or different from those offered or agreed upon, unless acceptance is expressly made conditional on assent to the additional or different terms.

Any acceptance that materially changes the offer is a counteroffer that must be accepted by the original offeror to form a contract.