What is a common characteristic of metered mail?

Metered mail is distinctive because it utilizes an electronic postage system, which allows postage to be printed directly onto the envelope or package rather than using traditional stamps. This system provides several advantages, including convenience for businesses that send a large volume of mail, as it streamlines the process of affixing postage. With this electronic method, organizations can easily manage and track their postage expenses, and it often allows for the integration of additional features such as tracking and delivery confirmation.

In contrast, having a return address is not inherently linked to metered mail, as return addresses are generally recommended for all types of mail. Additionally, while metered mail typically does not have physical postage affixed in the traditional sense, it is precisely due to the nature of how postage is printed electronically that distinguishes it from other forms of mailing, thus making this point less defining. While metered mail can be returnable, it is not an exclusive characteristic, as many types of mail can be returned if the proper return address and instructions are provided.