Class Action Litigation in California

A class action is a lawsuit where one or more people — called representative plaintiffs — sue on behalf of a larger group who suffered similar harm from the same conduct. Instead of each person filing separately, everyone's claims are resolved together in a single proceeding. This approach is especially useful when each person's individual loss is modest but the total harm across many people is significant. Common examples include defective products, misleading advertising, data breaches, and employment disputes.

Yes. California state courts follow their own procedural rules for class actions, which share similarities with federal rules but are not identical. Federal class actions filed in California's federal courts follow the Federal Rules of Civil Procedure. In both systems, a judge must certify the class — meaning the court must find that the case genuinely qualifies to proceed as a group action — before it moves forward.

A notice means a court has allowed a class action to proceed and has determined that you may be a member of the affected group. The notice explains the lawsuit, who qualifies, what you might receive if the case succeeds, and your rights — including the right to opt out, object, or do nothing. Read it carefully and note any response deadlines, since missing them can limit your options.

In most class actions seeking money damages, class members have the right to opt out and pursue an individual lawsuit instead. The notice you receive will explain how and by when to exercise that right. If you miss the opt-out deadline, you are generally bound by the outcome of the class case — whether a settlement or a judgment — even if you took no action.

A judge decides through a process called class certification. The court evaluates whether there are enough people with similar claims, whether the representative plaintiffs' situations are typical of the group, and whether a class action is the most efficient way to handle the dispute. Courts deny certification when individual circumstances vary too much from person to person, which is why not every group lawsuit qualifies.

Settlement terms and payment amounts vary by case and must be reviewed and approved by a judge as fair and reasonable for the entire class. After a proposed settlement is announced, class members typically receive another notice and may have an opportunity to object before it becomes final. Payments may come as checks, vouchers, or other compensation depending on how the settlement is structured.

California has specific laws covering employment-related class actions and related employee-protection claims involving wages, hours, and working conditions. If you believe your employer violated laws that affected a large group of workers, speaking with an employment attorney or contacting a legal-aid organization is an important first step. Deadlines in employment cases can be particularly short, so reach out as soon as possible — see the deadlines section of this page for general guidance.