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. The Postal Service grants mail cover surveillance requests for about 30 days and may extend them for up to 120 days.

单词	Mail cover
释义	Mail cover 原声例句 PBS访谈社会系列 You call it mail covers. Yes. 你称之为邮件封面。是的。英语百科 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. The Postal Service grants mail cover surveillance requests for about 30 days and may extend them for up to 120 days.
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