Contract

A contract is a promise made enforceable by law, usually because the beneficiary of the promise agreed to do something in return for it.

A written contract concerning future performance usually includes these provisions:

Recitals of intent (usually in the form of "Whereas" clauses)
Payment terms
Term for the contract
Duties of each party
Rights of termination
Rights if there is a default
Limitation of Liability
Indemnification
Remedies
Force Majeure
Choice of law and jurisdiction for disputes
Arbitration
Merger
Severability
Disclaimer of Agency or employment relation