All states can have different laws pertaining to consumers and contractors. The best way to protect yourself is to hire an attorney to make a contract for you to use with your customers. You should take video OR a lot of pictures before, during and after job is complete. Depending on amount that is owed to you, you can bring them to small claims court OR for larger amounts hire an attorney who drifted your contract. List your previous customers on this website to warn other contractors. It’s free.