Records and files are maintained on individuals and companies that are in violation of the law. The names of visitors, cellmates, and friends. For those granted probation, the names of employers, employment references, places of residence, and the names of friends. U.S. Service Postal Inspectors Information on persons receiving mail at a given address. Any forwarding address left by a person.
Examples are the sender's name and address, where and when it was mailed, and all outside markings.
The mail is not opened by the post office. State Department Passport Agency Date and place of birth of any person who has applied for a United States passport. Information about aliens who have been admitted to or departed from the United States. Transportation Department U.S. Coast Guard Names of persons and vessels seized in connection with smuggling contraband into the United States. The names and birthplaces of the owners of registered vessels.