How must addresses be printed on First-Class Mail International and First-Class Package International Service items?

Addresses on First-Class Mail International and First-Class Package International Service items must be printed in ink or typewritten. This requirement ensures that the addresses are clear and legible for postal processing and delivery. Using ink or a typewriter provides a permanent and professional appearance that aids in the accurate reading of the address by postal employees and automated systems.

Legibility is crucial in international shipping, where items may travel through various postal systems and require clear identification. Therefore, using ink or typewritten formats guarantees that there is no fading or smudging that could occur with other writing methods, such as pencil or marker, which are more prone to legibility issues.