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...

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

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...

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...

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...

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...