Overview of the most important concepts in contract law, including enforceable obligations and extrinsic evidence. This blog post will be your guide to understanding the fundamental concepts and principles of contract law.How do contracts work? What happens when you sign them? What goes into a legally binding agreement? Although contract law can become extremely complicated, at heart it is really very simple. Explore the fundamentals of contract law from key elements to the different types to what constitutes a breach of contract. The first step in creating a legally binding agreement is to outline the essential information for the contract and parties involved. Does it describe the contract? In the private ordering context, there are three basic theories of obligation: • Contract,.