A contract-law concept defining a formation element, enforceability rule, or negotiated term affecting obligations between parties. It governs formation, interpretation, performance, breach, or remedies by specifying conditions that must be satisfied or effects that follow. It does not apply where required assent, consideration, authority, or writing elements are absent when they are prerequisites. It materially determines whether obligations are enforceable and what remedies are available for nonperformance. The concept is generally stable, though statutory reforms and commercial practices may refine its application over time.

Principle

Courts may reform contractual text to align legal documentation with the parties' actual agreement where clear and convincing evidence shows a mutual mistake or a drafting error, and where reformation promotes the parties' objective intent without creating unfair surprise to third parties.

Demonstration

Two parties orally agree on a 5-year lease rate, but the written contract mistakenly states a 50-year term due to a typographical error. A court reforms the written instrument to record the 5-year term so the document matches the parties' intent.

Misapplication

Attempting reformation to gain a substantive advantage contrary to evidence of mutual intent, to alter essential negotiated terms after the fact, or to impose reformation where one party alone regrets a bargain and no mutual mistake exists.

Consequence

When reformation is granted, the contract's written language is changed to reflect the true agreement; extrinsic evidence may be considered, but reformation does not create new obligations beyond what the parties actually agreed or protect fraudulent unilateral schemes.

Reversal

Instead of reformation, a court may deny correction and either leave the written document as the operative instrument (forcing reliance on parol evidence limits) or grant remedies such as rescission or damages if reformation is improper.

Boundary

Reformation is not available when the alleged mistake is unilateral without equitable grounds, when the requested change would harm the rights of a bona fide third-party transferee, or when the statute prescribes exclusive remedies for certain types of contract defects.

Semantic Tension

Reformation sits between interpretation and rescission: interpretation resolves ambiguity within the existing text, reformation alters the text to conform to intent, and rescission unwinds the deal — tensions arise when fact patterns could justify more than one corrective remedy.

Synthesis

Contract reformation is a corrective remedy allowing courts to modify contractual text to reflect what parties actually agreed when mutual mistake or clear drafting error misstates the bargain; it preserves the underlying deal while correcting the instrument, bounded by equitable limits and third-party protections.