Contracts 1

Equitable Estoppel

An equitable doctrine that prevents a party from abandoning an assumption or expectation that they created or encouraged, especially when the other party relied on it to their detriment.

Main Idea of Equity Estoppel

It aims to avoid unconscionable conduct and detriment, not just enforce promises.

AERKDF

Mnemonic for the six elements of equitable estoppel: Assumption, Encouragement, Reliance, Knowledge, Detriment, Failure to avoid detriment.

Assumption / Expectation

What did the plaintiff believe would happen?

Encouraged / Induced

Did the defendant create or encourage that belief?

Reliance

Did the plaintiff act based on that belief?

Knowledge / Intention

Did the defendant know or intend for the plaintiff to rely on this assumption?

Detriment

Will the plaintiff suffer a disadvantage if the defendant abandons that assumption?

Failure to Avoid Detriment

Did the defendant fail to mitigate the disadvantage?

Waltons Stores v Maher (1988)

A crucial case illustrating equitable estoppel, where Maher acted to his detriment based on an assumption encouraged by Waltons Stores.

Significance of Waltons Stores v Maher

Equitable estoppel can provide relief even without an enforceable contract.

High Trees Case

A foundational case for promissory estoppel that shows parties may be prevented from insisting on strict legal rights because of reliance on representations.

Common Law vs Equitable Estoppel

Common law focuses on enforcing contractual promises, while equitable estoppel addresses unconscionable conduct and detrimental reliance.

Key Cases for Elements of Equitable Estoppel

E: Skywest; R: Sidhu; K: Crown Melbourne; D: Thompson/Quaglia/Hawker.

Remedy in Equitable Estoppel

Equitable relief should address the detriment suffered, not automatically enforce the original promise.

Structure for Problem Question

1. ISSUE: Is [D] estopped? 2. CONSIDERATION: Relevant if present. 3. ESTOPPEL: Analyze A, E, R, K, D, F. 4. REMEDY: What relief is appropriate? 5. CONCLUSION: Outcome likelihood.