Mutual Mistake

/ˈmjuːtʃuəl mɪˈsteɪk/

Definitions

  1. (n.) A shared erroneous belief by both parties to a contract about a basic fact that materially affects the agreed-upon exchange, often voiding or voidable the contract.
    The contract was rescinded due to a mutual mistake regarding the ownership of the property.

Commentary

Mutual mistake differs from unilateral mistake in that both parties share the erroneous belief; clarity in contract drafting can help avoid such issues.

This glossary is for general informational and educational purposes only. Definitions are jurisdiction-agnostic but reflect terminology and concepts primarily drawn from English and American legal traditions. Nothing herein constitutes legal advice or creates a lawyer-client relationship. Users should consult qualified counsel for advice on specific matters or jurisdictions.

Draft confidently with Amicus

Create, negotiate, and sign agreements in one secure workspace—invite collaborators, track revisions, and keep audit-ready records automatically.

Open the Amicus app
Amicus Docs | Mutual Mistake Definition