What is a lawsuit investigation?

Lawyers cannot file a lawsuit on a hunch. Under Federal Rule of Civil Procedure 11(b), an attorney who signs a complaint certifies that its factual claims have, or are likely to have, evidentiary support, based on "an inquiry reasonable under the circumstances." A court can sanction a lawyer or firm that violates the rule. State courts have similar rules.

For a class action, the stakes of that inquiry are higher. The lawyers need to know whether the problem is widespread, whether the company did the same thing to many people, whether a law provides a remedy, and whether customers signed an arbitration clause that would block a class case. They also need people willing to serve as named plaintiffs. When a court later picks lawyers to lead a class, Rule 23(g) requires the judge to consider "the work counsel has done in identifying or investigating potential claims in the action."

Investigations tend to follow public events that suggest many people were affected the same way:

• Data breach notices filed with state attorneys general or sent to customers. See data breach lawsuits.
• Recalls and safety warnings from agencies like the FDA or the Consumer Product Safety Commission. The Walmart Mainstays dresser recall is one example where, as of September 2026, we found a recall but no filed class action.
• Government actions, such as FTC or CFPB enforcement cases or state attorney general suits.
• Scientific studies linking a product to an illness, which often precede injury litigation.
• Waves of consumer complaints about the same fee, sales practice, or defect.

After a data breach, investigations can start within days, and the JPML counted 20 data breach and consumer privacy MDLs pending at the end of 2025. Some investigations are about individual claims rather than class cases. For example, attorneys review mixed credit file complaints person by person because each consumer's facts and damages differ.

These three labels mean very different things for you:

An investigation has no claim form, no deadline to file a claim, and no payment. If someone tells you to "file a claim" in an investigation, what they usually mean is a contact form to share your information with lawyers. By contrast, a settlement's claim, opt-out, and objection deadlines are set by court order, such as the December 1, 2026 claim deadline in the Amazon returns settlement. Only a court-approved settlement has an official claim website, which you can find on our open settlements list.

Every claim has a statute of limitations, a deadline to file. The Supreme Court held in American Pipe & Construction Co. v. Utah (1974) that filing a class action suspends that deadline for members of the proposed class. But an investigation is not a filing, so it pauses nothing.

Deadlines vary a lot by claim type and state. A few federal examples show the range:

• Fair Labor Standards Act wage claims must be filed within two years, or three years for willful violations, under 29 U.S.C. 255.
• Personal injury claims under state law often have deadlines of a few years, sometimes measured from when you discovered the injury.
• Consumer protection statutes each set their own periods.

If you believe you were seriously harmed, waiting for an investigation to turn into a class action can cost you your individual claim.

Contacting a firm about an investigation usually means answering questions about what happened, when, and what records you have. In general:

• It is free. Consumer and injury lawyers typically work on contingency, meaning they are paid only if there is a recovery.
• It does not commit you. You are not a plaintiff unless you sign a retainer agreement and agree to be named or to file a claim.
• You may be asked to be a named plaintiff. That role comes with duties, such as providing documents and possibly sitting for a deposition. See whether you would have to testify.
• You may hear nothing for a while. Investigations can take weeks or months, and many end quietly.

If a case is filed, Rule 23(g) directs the court to weigh the work each firm did "in identifying or investigating potential claims" when appointing class counsel, so firms have a reason to investigate early. Lawyer advertising is regulated by state bar rules, but any firm can say it is "investigating." A long list of investigations on a firm's website is not evidence that a case exists. Look for a court name and case number before assuming a lawsuit is pending.

1. Save your evidence. Keep receipts, statements, notices, emails, screenshots, the product and its packaging, and medical records if you were hurt.
2. Write down a timeline. Dates of purchase, use, symptoms, calls, or charges.
3. Do not sign a release from the company without reading it closely, since it can waive your claims.
4. Check whether a case or settlement already exists. Browse lawsuits attorneys are investigating or pursuing.
5. Get your situation reviewed. A free case review takes about two minutes and connects you with independent attorneys who handle these cases.

Keep your records for at least as long as the statute of limitations for your claim, which for federal wage claims is two years, or three years for willful violations. To understand what comes after an investigation, see how a class action lawsuit works and how to start a class action lawsuit.