The agreement must not only note a trade agreement, but also be registered in such a way that the agreement is enforceable in court. All parties must accept and sign the final contract, followed by the exchange of documents. The process of exchange is called the exchange of contracts. Once this is achieved, the agreement cannot be reversed, and the buyer must buy the product in question and the seller must sell it. To understand how verb writing has been associated with laws, rules, regulations, contracts, and wills, it may not distinguish between being interpreted by others or governing behavior. It may depend on the process by which these documents have traditionally been drafted. .