It lists the price and other details of the transaction and is signed by both the seller and the buyer. An invoice is an example of a sales contract. In the United States, a domestic purchase agreement is governed by the Commercial Code uniform. According to Article 2 of the Single Commercial Code, contracts for the sale of goods over $500 must be concluded in writing to be enforced. This is what we first know as a sales contract. This document is something that is legally valid and can also be implemented safely for some people. Some parts of the EDP define the different types of sales contracts that must be concluded in writing. In addition, each state will have its own form of fraud status. A sales contract is also called a sales contract, a sales contract, a contract contract or a sales contract. SpAs also contains detailed information about the buyer and seller.