This Practice Note is a ‘how to’ guide on preparing contracts to cover unforeseen events which signposts relevant content. It includes links to potentially relevant issues, including clauses dealing with force majeure, and other commercial and practical considerations. Where an unforeseen event has made a contract impossible to perform, or the obligations under a contract have been transformed into something radically different, it may be frustrated, thereby bringing the contract to an end and releasing both parties from any further performance obligations. However, the common law doctrine of frustration has a very narrow application. For more information, see Practice Note: Discharge by frustration. Parties will commonly agree contractual terms to cover the possibility of unforeseen events. For further guidance with links to more detailed content, see Practice Note: Drafting for unforeseen events—commercial contracts. See also: Contract risk management clauses—checklist for key clauses for managing contract risks, generally. Clauses to consider Force majeure Typically, the most obvious contractual provision when drafting to cover unforeseen events is a force majeure clause. There is no legal