In legal terminology, a simple contract is an agreement made by two parties. A simple contract can be either an oral or a written contract. Any breech of a simple contract can be ruled on by a judge in court.A simple contract may be used by catering companies to provide food for a single event.A breach of contract means that one of the parties ignored one or more terms in the agreement. simple contract in legal terminology is an oral or written agreement made by two parties. This is never a legally recorded or officially sealed contract, but breeches are still often ruled on by a judge in court.