This Practice Note considers the circumstances in which a settlement agreement may be set aside, including on the grounds of validity, whether by reason of capacity, mistake, illegality, fraud, so-called ‘sharp practice’ and duress. Challenging the validity of a settlement agreement Where the validity of a settlement agreement the subject of a Tomlin order or another final order made by consent is challenged, if proceedings were in existence before the settlement was made, a party may apply in the current proceedings to set aside the court order giving effect to the settlement under CPR 3.1(2)(p). This rule enables the court, under its general powers of case management, to make any order for the purpose of managing the case and furthering the overriding objective. Under the law of contract, there are circumstances in which a settlement agreement may be ineffective and it can be set aside. These include: • where one of the parties lacks capacity (for example, a child or a person lacking capacity under Mental Capacity Act 2005)—see: Setting aside a settlement