DocketX / Glossary / class certification
Class certification is a court's decision that a lawsuit can proceed as a class action, meaning one or a few people can sue on behalf of a larger group with similar claims.
It is a procedural step in a class action lawsuit where the judge determines whether the case meets legal requirements to represent a group of people who were harmed in a similar way. This decision typically occurs early in the litigation, after the complaint is filed but before the case moves to discovery or trial. The court examines factors like whether the group is so numerous that joining everyone individually is impractical, whether the claims share common questions of law or fact, and whether the representative parties will fairly and adequately protect the group's interests.
If the court grants certification, the lawsuit can bind all class members (unless they opt out), which can save time and money for everyone involved. If certification is denied, the case usually proceeds only for the named plaintiffs individually, which may be impractical or too costly for a single person to pursue.
Many people mistakenly think class certification automatically means the plaintiffs will win or that all class members will receive money immediately. In reality, certification is just a procedural gatekeeping step—the case still must go through trial or settlement to resolve the actual claims.
Get the actual rule
This page explains the concept. When it matters to your case, read the rule that governs it in your court — we hold Texas, federal and Washington court rules word for word, and every state's official resources are on the state pages. If someone cites a case at you, check that it exists first.
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General explanation, not legal advice, and not specific to any state — procedures and deadlines vary by jurisdiction and court. If you can get a lawyer or free legal aid, do: every real option.