The coordinated hidden surveillance of a location or person for the purpose of gathering evidence.

Indicates the time and place at which service was effected, the person served, and any additional information needed to establish that service was properly made.

Notice is the legal concept in which a party is made aware of a legal process affecting their rights, obligations or duties.

Term used to describe the process of locating a person's whereabouts for any number of purposes, ie service of process, witness location, debt collections, bail bond enforcement.

The French word for “watching over”. The monitoring of the behavior, activities, or other changing information, usually of people for the purpose of influencing, managing, direction or protecting.