When multiple courts have concurrent jurisdiction over a plaintiff’s claims, the plaintiff may forum shop, or choose the court that will treat his or her claims most favorably.
In the United States, forum shopping most typically occurs when state and federal courts have concurrent jurisdiction over a claim. State and federal courts have different procedural rules and, in some cases, also use different substantive law. See choice of law. Plaintiffs can use this to their advantage. For example, a plaintiff suing a large corporate defendant might sue in state court, predicting that a local jury would be more sympathetic than a federal jury. Alternatively, a plaintiff might prefer one jurisdiction due to a quirk of its procedural rules or due to its choice of law rule. See state procedural laws; Federal Rules of Civil Procedure.
Sometimes, plaintiffs deliberately structure their state law claims against out-of-state defendants to prevent the