Mail cover

Mail cover is a law enforcement investigative technique in which the United States Postal Service, acting at the request of a law enforcement agency, records information from the outside of letters and parcels before they are delivered and then sends the information to the agency that requested it.[1] The Postal Service grants mail cover surveillance requests for about 30 days and may extend them for up to 120 days.

Mail covers can be requested to investigate criminal activity or to protect national security.

Mail cover is defined by the U.S. Postal Regulations 39 CFR 233.3[2] and the Internal Revenue Manual[3] as follows:

Mail cover is the process by which a nonconsensual record is made of any data appearing on the outside cover of sealed or unsealed mail; or by which a record is made of the contents of any unsealed mail, as allowed by law, to obtain information to protect national security; locate a fugitive; obtain evidence of the commission or attempted commission of a crime; obtain evidence of a violation or attempted violation of a postal statute; or assist in the identification of property, proceeds, or assets forfeitable under law.