Offer and acceptance does not always need to be expressed orally or in writing. Learn the elements of a valid contract law including offer, acceptance, consideration, and more to ensure legally binding agreements.An offer is a clear intention to enter into a legally binding agreement. It marks the first step in creating that agreement. The key elements of a contract are Offer, Acceptance, Awareness, Consideration, Capacity, and Legality. In this article, we will unravel the intricacies of offer and acceptance in the context of UK law, providing clarity and insight for undergraduate law students. If you send a letter accepting the offer, you indicate your willingness to work, but it is not really binding in the sense you seem to be thinking of.