The roles of post offices include: 1. delivering mail and packages within a country and abroad. 2. selling postal products such as stamps, money orders, and other financial services. 3. offering passport services, including passport applications and renewals. 4. providing various other services, such as document notarization and bulk mailings. 5. collecting taxes, duties, and other payments. 6. providing access to banking services such as bill payment and money transfers. 7. serving as a hub for community activities. 8. serving as a secure, convenient location for mail-in voting.