Estoppel is a judicial device in common law legal systems whereby a court may prevent or "estop" a person from making assertions or from going back on...

An Estoppel Certificate (or Estoppel Letter) is a document commonly used in due diligence in real estate and mortgage activities. It is based on estoppel...

Collateral estoppel (CE), known in modern terminology as issue preclusion, is a common law estoppel doctrine that prevents a person from relitigating an...

Estoppel in English law is a doctrine that may be used in certain situations to prevent a person from relying upon certain rights, or upon a set of facts...

Proprietary estoppel is a legal claim, especially connected to English land law, which may arise in relation to rights to use the property of the owner...

In the common law, judicial estoppel (also known as estoppel by inconsistent positions) is an estoppel that precludes a party from taking a position in...

The doctrine of assignor estoppel is a doctrine of United States patent law barring a patent's seller (assignor) from attacking the patent's validity in...

similar to acquiescence include: The common law doctrine of estoppel. A claim of estoppel may arise when one party gives legal notice to a second party...

Legal estoppel is a principle of law, particularly United States patent law, that an assignor or grantor is not permitted subsequently to deny the validity...

direct estoppel prevents a party to  litigation from relitigating an issue that was decided against that party. Direct estoppel and collateral estoppel are...

Estoppel is a common law doctrine which, when it applies, prevents a litigant from denying the truth of what was said or done. The doctrine of estoppel...

Prosecution history estoppel, also known as file-wrapper estoppel, is a term used to indicate that a person who has filed a patent application, and then...

contractual term. Two distinct but related types of estoppel recognised in Canada are promissory estoppel or estoppel by representation, which enables courts to...

High Court of Australia. The case is notable for originating the 'Anshun estoppel' doctrine in Australian civil proceedings. The rule estops parties from...

Licensee estoppel is a doctrine under which a licensee of an intellectual property right, generally a patent or a trademark, is estopped from challenging...

the High Court. It reaffirmed and extended the doctrine of promissory estoppel in contract law in England and Wales. However, the most significant part...

De facto corporation and corporation by estoppel are both terms that are used by courts in most common law jurisdictions to describe circumstances in which...

seller's authority to sell"). Methods of the estoppel can be by words, by conduct, or by negligence. Estoppel by words, or representation by the original...

claim preclusion and issue preclusion (also called collateral estoppel or issue estoppel), though sometimes res judicata is used more narrowly to mean...

assumed jurisdiction over the estoppel clauses upon Eddy's death. However, according to Eddy biographer Robert Peel, the estoppel clauses still add "moral...

Verwayen, also known as the Voyager case, is a leading case involving estoppel in Australia. Bernard Verwayen sued the Australian government for damages...

jurisdiction Doctrines Business judgment rule Corporate governance De facto and estoppel corporations Internal affairs doctrine Limited liability Tag-along right...

element has been substituted) and the doctrine of prosecution history estoppel (which holds that a party who makes a change to a patent application to...

'merge' proceedings, giving rise to res judicata or a cause of action estoppel in civil proceedings.: 277–278  A plea of "autrefois acquit" is one in...

comparable to, but somewhat broader than, the doctrine of legal estoppel, assignor estoppel, or estoppel by deed in U.S. law. Under the doctrine of non-derogation...

seller owns, a court may step in and create an easement. Easements by estoppel generally look to any promises not made in writing, any money spent by...

overturned three of the four convictions based on the doctrine of entrapment by estoppel. (The fourth refused to state his address, at which point the committee...

resulting patent. It is one type of file-wrapper estoppel, the other being prosecution history estoppel. Whenever an applicant makes a clear and unambiguous...

to contract formation has been modified by developments in the law of estoppel, misleading conduct, misrepresentation, unjust enrichment, and power of...

finality of the mortgage conveyance. Other defenses, including equitable estoppel, were used to bar redemption as well. This unsettling system had a negative...