When it comes to business then verbal contracts should never be considered. Fighting this in court is very difficult when it turned into a he said/she said. One way to prove is the proof expenses and proof of services. The Uniform Commercial Code governs contracts involving the sale of goods. It requires that contracts for the sale of goods over $500 to be in writing. This is a good way to ensure proper contracts are made, but if any cause there is a business offer and acceptance there should be a written agreement. There is no such thing as too much protection.