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  2. Registered mail - Wikipedia

    en.wikipedia.org/wiki/Registered_mail

    While not a form of registered mail, certified mail allows the sender proof of mailing via a mailing receipt and, upon request, electronic verification that an article was delivered or that a delivery attempt was made. [17] Some in-transit tracking and delivery confirmation information may be provided, but there is no formal chain of custody.

  3. 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.

  4. 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]

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

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

    U.S. Special Delivery was a postal service paid for with additional postage for urgent letters and postal packets which are delivered in less time than by standard or first class mail service. Its meaning is different and separate from express mail delivery service. Essentially it meant that a postal packet was delivered from a post office to ...

  6. Royal Mail - Wikipedia

    en.wikipedia.org/wiki/Royal_Mail

    Royal Mail Group Limited, trading as Royal Mail, is a British postal service and courier company. It is owned by International Distribution Services . It operates the brands Royal Mail (letters and parcels) and Parcelforce Worldwide (parcels).

  7. Find delivery delays or identify the sender in AOL Mail

    help.aol.com/articles/use-full-headers-to-find...

    An email sender can make it look like the email came from a different address, but you can find the true information in the full header. 1. View the full header following the steps above.

  8. Package tracking - Wikipedia

    en.wikipedia.org/wiki/Package_tracking

    A multifunction barcode scanner being used to monitor the transportation of packages of radioactive pharmaceuticals. Mail tracking is made possible through certified mail and registered mail, additional postal services that require the identity of a piece of mail to be recorded during various points of delivery, so that the sender can obtain a proof of delivery and the receiver can predict the ...

  9. Use full headers to find delivery delays or a forged email's ...

    help.aol.com/articles/use-full-headers-to-find...

    An email's full headers include information about how it was routed and delivered as well as information about the true sender of the email. View the full headers to find out where an email was delayed or who really sent an email with a forged address.