Law which gives a local state court jurisdiction over an out-of-state company or individual whose actions caused damage locally or to a local resident. the legal test is whether the out-of-state defendant has contacts within the state which are “sufficiently substantial.” an accident or injury within the state usually shows such a substantial contact. this is particularly important when a driver from one state is sued in another state for damages caused by his/her negligence there. it also can be employed if a product shipped from out-of-state fails, explodes or causes damage to a local person who sues in the state where he/she resides. the long-arm statute allows him/her to get local court jurisdiction over the defendant.