The Lawletter Vol 42 No 7
Lee Dunham, Senior Attorney, National Legal Research Group
Collateral estoppel, also known as "issue preclusion," prohibits relitigation of factual or legal issues that have been "actually and necessarily decided" in earlier litigation. See, e.g., Banga v. First USA, 29 F. Supp. 3d 1270, 1280-81 (N.D. Cal. 2014) (citing San Remo Hotel L.P. v. San Francisco City & County, 364 F.3d 1088, 1094 (9th Cir. 2004)). Unlike the related doctrine of res judicata (or "claim preclusion"), which operates as a complete bar to relitigation of an entire claim, under collateral estoppel, the (new and different) claim may proceed, but "the prior judgment conclusively resolves an issue actually litigated and determined in the first action." DKN Holdings LLC v. Faerber, 61 Cal. 4th 813, 824, 352 P.3d 378, 386-87 (2015), reh'g denied (Aug. 12, 2015). Claim preclusion bars litigation of all issues that were or could have been litigated in the original action under the original claim, while issue preclusion resolves only those issues that were actually litigated. Banga, 29 F. Supp. 3d at 1280-81.
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