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  2. Mail Isolation Control and Tracking - Wikipedia

    en.wikipedia.org/wiki/Mail_Isolation_Control_and...

    The Postmaster General has stated that the system is primarily used for mail sorting, [2] though it also enables the USPS to retroactively track mail correspondence at the request of law enforcement. [2] It was created in the aftermath of the 2001 anthrax attacks that killed five people, including two postal workers.

  3. Tracking number - Wikipedia

    en.wikipedia.org/wiki/Tracking_number

    It is a unique ID number or code assigned to a package or parcel. The tracking number is typically printed on the shipping label as a bar code that can be scanned by anyone with a bar code reader or smartphone. In the United States, some of the carriers using tracking numbers include UPS, [1] FedEx, [2] and the United States Postal Service. [3]

  4. Package tracking - Wikipedia

    en.wikipedia.org/wiki/Package_tracking

    Tracking packages with stationary bar code reader in a warehouse sorting operation. Package tracking or package logging is the process of localizing shipping containers, mail and parcel post at different points of time during sorting, warehousing, and package delivery to verify their provenance and to predict and aid delivery.

  5. Express mail in the United States - Wikipedia

    en.wikipedia.org/wiki/Express_mail_in_the_United...

    The term Priority Mail Express International is distinct from the domestic service called Priority Mail Express, which is a specific classification of mail for domestic accelerated postal delivery within the U.S. In 2013, the USPS changed the name of the service from "Express Mail International" to "Priority Mail Express International". [6]

  6. U.S. Special Delivery (postal service) - Wikipedia

    en.wikipedia.org/wiki/U.S._Special_Delivery...

    In 1886 Congress revised Special Delivery service to all U.S. post offices. Special Delivery service was in operation from 1885 to 1997 whereby the letter would be dispatched immediately and directly from the receiving post office to the recipient rather than being put in mail for distribution on the regular delivery route. [1]

  7. Intelligent Mail barcode - Wikipedia

    en.wikipedia.org/wiki/Intelligent_Mail_barcode

    An Intelligent Mail barcode has also been referred to as a One Code Solution and a 4-State Customer Barcode, abbreviated 4CB, 4-CB or USPS4CB. The complete specification can be found in USPS Document USPS-B-3200. [2] It effectively incorporates the routing ZIP Code and tracking information included in previously used postal barcode standards.

  8. Click-N-Ship - Wikipedia

    en.wikipedia.org/wiki/Click-N-Ship

    Click-N-Ship is a service offered by the United States Postal Service that allows customers to create pre-paid Priority Mail shipping labels on ordinary printer paper. [ 1 ] [ a ] The labels include delivery confirmation numbers to track date and time of delivery or attempted delivery. [ 2 ]

  9. Informed Delivery - Wikipedia

    en.wikipedia.org/wiki/Informed_Delivery

    Because Informed Delivery offers increased visibility into both mail and packages being delivered to an individual’s address, USPS verifies identities of individuals, including the use of a mail-based verification letter. Mail Scanning: The scanned mail images are of the external markings, showing only the exterior, address side of letter ...