Manifest Disadvantage CASES

In English law, manifest disadvantage was a principle used in undue influence cases, requiring claimants to show that a transaction was clearly detrimental to them. It arose particularly in the context of presumed undue influence but has since been refined by later case law.

Definition and Principles

The concept was developed to help courts distinguish between legitimate influence and unconscionable pressure. It asked whether the transaction placed the influenced party at a clear and unjustifiable disadvantage.

Requirements for Establishing

• Clear detriment: The transaction must have been obviously harmful to the weaker party.
• Presumption of influence: Typically applied where relationships of trust existed, such as between solicitor and client.
• Judicial development: Early cases emphasised manifest disadvantage, but its role has since diminished.

Practical Applications

Historically applied in cases of undue influence, such as Allcard v Skinner (1887). Later, in CIBC Mortgages v Pitt (1994), the House of Lords clarified that manifest disadvantage is not always required, especially in actual undue influence claims.

Importance

Though less central today, manifest disadvantage remains important for understanding the evolution of undue influence and the courts’ protection of vulnerable parties in equity.