General Understanding of Collateral Estoppel and Res Judicata

in Appeal, Standard of Review, Trial Perspectives

There are two similarly related legal doctrines known as collateral estoppel and res judicata. The doctrines are designed to prevent a party from re-litigating either a prior issue (collateral estoppel) or claim (res judicata). These doctrines are generally discussed below regarding the elements (in the case of collateral estoppel) or the identities (in the case of res judicata) required to support their application. Keep in mind that these are nuanced legal doctrines and a party should consult with counsel to determine the application of these doctrines which are typically raised as an affirmative defense in a lawsuit. Collateral Estoppel =...