People ask two different questions with similar words: how do I start a class action, and how do I join one? The answers are very different. Starting one is a major legal project that needs a lawyer. Joining one is often as simple as filling in a claim form.
Quick answer: To start a class action, you contact a class action lawyer who investigates and files the case with you as the named plaintiff. To join an existing one, you usually do nothing to become a class member, then submit a claim form before the settlement deadline to get paid.
Key takeaways
- You do not pay to join a class action settlement.
- Starting a class action realistically needs an experienced class action attorney.
- Claim deadlines are strict, so read the official notice.
- Beware of sites that charge to file claims for you.
How to start a class action lawsuit
- Confirm others were harmed the same way. A class action needs many people with similar claims, such as the same hidden fee or defective product.
- Collect evidence. Keep receipts, emails, statements, photos and screenshots of the problem.
- Contact a class action lawyer. Most take these cases on contingency, so you pay only if there is a recovery. See how contingency fees work.
- Agree to be the named plaintiff. You may be asked for documents and to answer questions.
- The lawyer files and seeks certification. The court decides whether the case can proceed for the whole class under Rule 23.
Check first whether a case already exists. See our list of open class actions. If your problem is only yours, an individual case may fit better. Read how to sue a company.
How to join an existing class action
- Find the case. Look for the notice you received or search open settlements. Our 2026 settlement list shows deadlines.
- Check the class definition. It says who qualifies, such as customers who bought a product in certain years.
- Use the official settlement website. The notice gives its address and your claim ID.
- Submit the claim form on time. Some require proof of purchase and some do not.
- Choose your payment method and keep confirmation.
Watch for scams. A real class action settlement never requires you to pay to claim your share. If a site asks for a fee or for sensitive details beyond what the claim form needs, stop and check the court approved settlement website.
Class action or mass tort?
Injury cases such as drug or chemical claims usually proceed as mass torts, where you hire a lawyer to file your own case. See the Suboxone lawsuit and hair relaxer lawsuit pages. For the basics, read what a class action lawsuit is.
Frequently asked questions
How do I start a class action lawsuit?
Gather evidence, confirm others were harmed the same way and contact a class action lawyer who files the case with you as named plaintiff.
How do I join a class action lawsuit?
If you fit the class, you are usually included automatically. To receive money you submit a claim form on the settlement website before the deadline.
How much does it cost to start a class action?
Class lawyers typically work on contingency, so you usually pay nothing upfront. Ask the lawyer to explain fees and costs in writing.
How do I find a class action lawsuit I qualify for?
Check notices you received, search settlement websites and review lists of open cases, then confirm the class definition fits you.
Do I need proof to claim?
Some settlements require proof of purchase and others accept a sworn statement. The notice explains which applies.
Can I sue on my own instead?
Yes. You can opt out of a class and file your own case, which is worth considering if your losses are large. Read how to file a lawsuit.
This article is general information, not legal advice. Each case has its own rules and deadlines. Always rely on the official notice and speak to a licensed attorney about your options.