USA != world 1. UPS do not leave packages at door in all countries 2. Some people live in apartments with nowhere safe for packages to be left 3. In some cit

USA != world 1. UPS do not leave packages at door in all countries 2. Some people live in apartments with nowhere safe for packages to be left 3. In some cities/countries in-person delivery does not exist at all. Only "collect at post office"