In law about offers

Question

 if an offeror proposes to sell a product for $100 and the offeree accepts by using a letter. before the offeror receives the letter, he calls the offeree to propose another offer that is to sell the product for $200. the next day then, the offeror recives the letter that the offeree has accepted to sell the product for $100. what offer is valid and what case law can prove this?

Answer 1

The legal doctrine applicable to this question is the mailbox rule. The mailbox rule pertains to the timing of acceptance. The mailbox rule states that acceptance by mail or similar means is effective at the moment of dispatch. In other words, the acceptance is effective as soon as the offeree places his acceptance in the mail.

In your question, the offeree properly accepted the offer to buy the product when he sent a letter accepting the offer. Therefore, the valid contract is for sale of the product at $100 and any subsequent acceptance does not matter.