What component is present in all bars of the Intelligent Mail Barcode?

The Intelligent Mail Barcode (IMB) is a 65-bar code that is used in the United States for mail tracking and delivery, combining various functionalities into one symbol. Among the components of the IMB, the tracker element is crucial because it is specifically designed to allow for tracking of the mail piece throughout its journey in the postal system.

The tracker element serves as a unique identifier that links each piece of mail to the corresponding data in the postal service’s tracking system, ensuring that each item can be monitored effectively from the point of entry to the final destination. This is essential for maintaining the integrity and reliability of mail services, particularly for businesses that rely on accurate mail delivery.

In contrast, other elements—such as the decender and ascender elements—are not universally present in all bars of the Intelligent Mail Barcode. The height indicator is also not a standard component across every instance of the IMB. Thus, the tracker element is the key feature that characterizes all bars of the Intelligent Mail Barcode, making it essential for effective mail tracking and processing.