Most everyone finds the need at one time or another to check someone out. Background information can be obtained for any legitimate purpose and in most cases does not require the permission of the person being investigated. Compilation of information from numerous databases, returns combination of address history, neighbors, relatives, motor vehicles, real property, judgments, leins, etc.
Some statewide searches require social security number, race and sex.
Arrest records available in some states. Requires full name, date of birth and social security number. Records of parties to civil litigation are available by county. These records include civil lawsuits and divorces. Inputs require the subject's full name and the name of the county or counties to be searched.