Amchem Prods., Inc. v. Windsor

Holding that courts are "bound to enforce" Rule 23's certification requirements, even where it means decertifying a class after they had reached a settlement agreement and submitted it to the court for approval

Gen. Tel. Co. of Sw. v. Falcon

Holding that named plaintiff must prove “much more than the validity of his own claim”; the individual plaintiff must show that “the individual's claim and the class claims will share common questions of law or fact and that the individual's claim will be typical of the class claims,” explicitly referencing the “commonality” and “typicality” requirements of Rule 23

Eisen v. Carlisle Jacquelin

Holding that individual notice to class members identifiable through reasonable efforts is mandatory in (b) actions

Altria Grp., Inc. v. Good

Holding that federal law did not preempt common-law fraud claim against cigarette manufacturer based on advertising of light cigarettes

Lexecon Inc. v. Milberg Weiss Bershad Hynes Lerach

Holding that, because the remand requirement is absolute, the transferee court may not invoke the change-of-venue statute to assign transferred cases to itself for trial

Cel-Tech Communications, Inc. v. Los Angeles Cellular Telephone Co.

Holding that for an act to be "unfair," it must "threaten" a violation of law or "violate the policy or spirit of one of those laws because its effects are comparable to or the same as a violation of the law"

Korea Supply Co. v. Lockheed Martin Corp.

Holding that plaintiff cannot recover damages under Cal. Bus. Prof. Code § 17200 unless plaintiff has "an ownership interest in the money it seeks to recover"

In re Tobacco II Cases

Holding class representatives had standing to challenge common marketing of cigarettes despite differences in the advertisements or statements on which class members relied

In re Prudential Insurance Company

Holding the district court acted well within its discretion in denying an objector's request for discovery where the objector was able to present his arguments to the court during the fairness hearing and where the court found the objector "had ample opportunity to avail himself of the substantial discovery provided to Lead Counsel but failed to do so, and that additional discovery was unnecessary because [the objector] focused primarily on legal issues"

Hanon v. Dataproducts Corp.

Holding that the defendants' statements emphasizing superior quality were material because "a reasonable jury could conclude that [the company] publicly released optimistic statements ... when it knew [its product] could not be built reliably"

Rule 23 - Class Actions

Holding that, to certify a class, the court must find that "questions of law or fact common to class members predominate over any questions affecting only individual members"

Section 17200 - Unfair competition defined

Prohibiting unlawful business practices

Section 1961 - Definitions

Defining what the terms “person” and “enterprise” include

Section 1407 - Multidistrict litigation

Authorizing consolidation of pretrial proceedings for related cases filed in multiple federal districts

Section 1750 - Title of act

Section 17500 - Untrue or misleading advertising

Requiring action that originated in California to effect consumers in another state

Section 815 ILCS 505/2

Prohibiting "[u]nfair methods of competition and unfair or deceptive acts or practices"

Section 1780 - Action by consumer; remedies; senior citizens or disabled persons; costs and attorney's fees

Granting standing to consumers who have suffered damage "as a result of" a violation

Section 1760 - Liberal construction and application

Stating the purpose of the CLRA is "to protect consumers against unfair and deceptive business practices"

Section 28-3905 - Complaint procedures

Providing that “public interest organization may, on behalf of the interests of a consumer or class of consumers, bring an action seeking relief from the use by any person of a trade practice in violation of a law of the District if the consumer or class could bring an action under subparagraph of this paragraph for relief from such use by such person or such trade practice”