The simplified address format may be used for which type of mail?

The simplified address format is specifically designed for use in international mail. This format streamlines the addressing process, making it easier to manage and process mail that crosses international borders. It allows senders to include shorter address information, which can facilitate quicker mail handling by postal services in different countries.

Utilizing this format helps to reduce errors and improve delivery efficiency in international mailing, while adhering to the regulations set by postal authorities. Therefore, for sending mail to destinations outside of the sender's home country, the simplified address format provides a practical solution that caters to the complexities of international shipping.

The other types of addresses mentioned, such as individual addresses within cities, business addresses, and box-holders on rural routes, typically require a more detailed addressing method to ensure accurate local delivery.