Court and litigation law is the branch of law for seeking redress for civil greviances between parties using the judiciary system.
There are a number of courts. Each court has jurisdiction to hear certain types of cases. A court usually has jurisdiction over disputes between parties who are in (or deemed to be in) the geographic area that the court serves. It can also have jurisdiction over disputes involving property located in the geographic area.
Several different courts may have the ability to hear a dispute. For example, one or more state courts may be able to hear a case involving federal law. One or more federal courts may also be able to hear the case. This can raise interesting and complex questions as to which form is best or more appropriate.
Just as there are a a number of different courts, there are a number of different rules that apply to different courts. Most courts publish and follow their own procedural rules. These rules specify how the court functions. Courts also follow a set of evidentiary rules. These rules specify what evidence can be presented to the court and how the court can consider the evidence.