A contract is a legally binding exchange of promises or agreement between parties that the law will enforce. Contract law is based on the Latin phrase pacta sunt servanda (agreements must be kept). Breach of contract is recognised by the law and remedies can be provided.

Almost everyone makes contracts everyday. Sometimes written contracts are required, e.g., when buying a house. However the vast majority of contracts can be and are made orally, like buying a law text book, or a coffee at a shop. Contract law can be classified, as is habitual in civil law systems, as part of a general law of obligations (along with tort, unjust enrichment or restitution).

The following are notes compiled in 2007 for revision purposes on UK Contract Law. It might not be complete or accurate and should only be used for educational or reference purposes only.