Meaning
Shared incorrect assumptions made by all parties to an agreement at the time of its execution can render a written contract void or voidable. A common mistake occurs when both signatories share the same erroneous belief about a fundamental fact or a specific document term. Unlike situations where only one side is confused, this scenario involves a mutual misunderstanding of the transaction’s core basis.
Shared Assumption
When negotiating a transaction, parties proceed on certain unspoken premises that they both believe to be true. If these underlying premises are later discovered to be false, the commercial utility of the transaction may disappear entirely. Proving this requires showing that both parties held the identical wrong belief when signing.
Contractual Remedy
Courts of equity can intervene to set aside the agreement or to rectify the document so it reflects the real agreement. This correction ensures that neither party is forced to perform an obligation that neither ever intended to create. It provides a means to prevent unfairness without releasing the parties from their genuine commitments.
Allocation Risk
Agreements often assign the danger of unexpected circumstances to one specific participant. If the contract explicitly handles who bears the consequences of an error, the court will not step in to alter the agreement. Knowing who carries this liability determines the pricing and terms of the deal.