You can, but a group of individuals who were harmed similarly can’t simply file a class-action lawsuit. What constitutes a class and what classes can file lawsuits for are dictated by the Federal Rules of Civil Procedure.u003cbr/u003eu003cbr/u003eUnder u003cstrongu003eu003ca href=u0022https://www.cit.uscourts.gov/sites/cit/files/Rule%2023.pdfu0022u003eRule 23u003c/au003eu003c/strongu003e, a class must be big enough that it is impractical or impossible to join every member in a smaller lawsuit. Every plaintiff’s claims need to involve the same questions of fact or law. The plaintiff named class representative needs to bring the same claim that the rest of the class brings and must adequately and fairly protect the class’s interests. Class representatives cannot have conflicts of interest.u003cbr/u003eu003cbr/u003eClasses can only file class-action lawsuits when a risk exists that inconsistent results would arise from individual lawsuits. In the illegal bank fees example, two customers could sue, but one might win and one might lose. This isn’t fair, and the law wants every individual filing the same claim to be treated the same. u003cbr/u003eu003cbr/u003eClasses may also sue if they seek a court order that would be appropriate for the entire class, or if issues of fact or law relating to the whole class are the primary case issues, overwhelming individual plaintiffs’ unique issues.