Jeffrey Johnson is a legal writer with a focus on personal injury. He has worked on personal injury and sovereign immunity litigation in addition to experience in family, estate, and criminal law. He earned a J.D. from the University of Baltimore and has worked in legal offices and non-profits in Maryland, Texas, and North Carolina. He has also earned an MFA in screenwriting from Chapman Univer...

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UPDATED: Feb 20, 2013

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A class action is a civil suit brought by one or more people on behalf of themselves and others who are similarly situated. In other words, the others are in a substantially similar circumstance where the common issues are the most critical to the lawsuit. For example, if a large number of consumers is injured as a result of an allegedly defective product, the principal issue will be whether the product caused the injury. Some examples of class actions are those brought against the manufacturers of allegedly defective or hazardous products, such as asbestos, certain vaccines, Agent Orange, tobacco, and breast implants. Only then will the question of how badly each party was injured be heard.

Class actions may also be brought on contracts. For example, all customers of America Online could claim damages when it went to its $19.95 per month rate – with inadequate capacity to handle the increased traffic.

Another frequent field for class actions is securities claims. For example, suppose a company issues an allegedly false press release and the stock goes from $10 to $15 but when the truth comes out the stock falls to $6 per share. A class action could be brought on behalf of all the stockholders who purchased shares after the company issued deceptive news and before the truth came out. Each member of the class allegedly suffered some harm as a result of the alleged wrong. The damages each member of the class will vary – someone who bought 1,000 shares at $15 each would be 10 times more impacted than a person who bought 100 shares at $15 – but the critical issue is whether the press release was deceptive, and that is common to all class members.

Typical class actions involve hundreds, thousands or millions of people who have comparable claims. Class action “certification” permits all claims to be heard in a single trial.