Which type of agreement must always be in writing to be enforceable?

The requirement for certain agreements to be in writing stems from the Statute of Frauds, which mandates that specific types of contracts must be documented to be enforceable in law. A domestic contract, such as a marriage contract, is one of those types that fall under this requirement. These agreements often involve significant commitments and rights between parties, and having a written contract helps to clarify intentions, reduce misunderstandings, and provide legal enforceability.

In contrast, oral agreements, such as those involving payment, informal handshake deals, or verbal agreements for services, may be enforceable under certain conditions but do not carry the same requirement for writing. The nature of the contracts and the potential complexity or implications of domestic contracts like marriage necessitate a written form to safeguard the interests of the parties involved. Therefore, the choice pointing to a marriage contract correctly identifies the type of agreement that must always be documented to ensure its enforceability.