What is mail mark

Mailmark is a postal marking system used by the United States Postal Service (USPS) to track and verify the delivery of mail and packages. It is a unique barcode that is applied to mailpieces, such as letters, flats, and parcels, to identify them and track their movement through the postal system.

Mailmark is used to:

1. Track and verify delivery: Mailmark allows the USPS to track the movement of mailpieces and verify their delivery to the intended recipient.
2. Provide proof of mailing: Mailmark provides a record of when the mailpiece was mailed, which can be used as proof of mailing for legal and business purposes.
3. Facilitate returns: Mailmark makes it easier to return undeliverable mailpieces, as the USPS can quickly identify the sender and return the item to them.
4. Improve customer service: Mailmark helps the USPS to provide better customer service by allowing them to quickly and easily locate and track mailpieces.

Mailmark is applied to mailpieces using a special machine that prints the barcode on the mailpiece. The barcode contains information such as the sender's address, the recipient's address, and the date of mailing.

There are different types of Mailmark, including:

1. Intelligent Mail Barcode (IMb): This is the most common type of Mailmark, which is used for letters, flats, and parcels.
2. Package Barcode (PBC): This type of Mailmark is used for packages and parcels.
3. Flat Sequence Barcode (FSB): This type of Mailmark is used for flats, such as large envelopes and packages.

Overall, Mailmark is an important tool for the USPS and for businesses and individuals who send mail and packages. It helps to improve the efficiency and accuracy of the postal system, and provides a way to track and verify the delivery of mailpieces.