What special type of label printer that prints postage stamps?

Answer 1

You need a thermal printer that will print the Information-Based Indicia (IBI).

This refers to a secure postage evidencing standard used by the United States Postal Service (USPS) to indicate electronic postage payment.

Information-Based Indicia is a 2-dimensional PDF417 or data matrix barcode combined with human-readable information.

The barcode data contains such information as amount of postage, origin zip code, destination, mail class, weight, confirmation/tracking numbers, and a cryptographic signature. The human-readable information shows at a minimum the information required by the USPS Domestic Mail Manual (DMM).

The indicta must be of sufficient quality (99% accurate) to pass muster with the post office, therefore you'd need a newer, high quality thermal printer.

Answer 2

A special type of label printer that prints postage stamps is known as a postage label printer. These printers are approved by postal services to produce valid postage labels that can be used to send mail and packages. They often come with specific software that integrates with postal services to calculate accurate postage rates.