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The tracking number may come from the USPS, UPS, or another carrier; how scammers access the numbers is unclear, but that's a problem for the carriers to address.
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]
[citation needed] The service also allows the receiver to track their package/envelope through the online system at usps.com using the unique tracking number provided by the mailer. [15] Certified mail can be combined with (for an additional fee) or without "return receipt requested" service, often called "RRR."
A PLANET barcode appears either 12 or 14 digits long. The barcode: identifies mailpiece class and shape; identifies the Confirm Subscriber ID; includes up to 6 digits of additional information that the Confirm subscriber chose, such as a mailing number, mailing campaign ID or customer ID
The service became quickly popular: for UPS the number of packages tracked on the web increased from 600 a day in 1995 [9] to 3.3 million a day in 1999. [10] On-line package tracking became available for all major carrier companies, and was improved by the emergence of websites that offered consolidated tracking for different mail carriers. [11]
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.
The UPU S10 standard defines a system for assigning 13-character identifiers to international postal items for the purpose of tracking and tracing them during shipping. With increased liberalization and the possibility of multiple postal services operating in the same country, the use of country codes to designate the postal service is a problem.
US Postal Service scans this number and sends its status to the voter or third-party tracking service, depending on the state. [1] [2] All voters can choose to be notified by USPS's Informed Delivery Service to track delivery of their ballot to their address. [3]