How To Write A Address Labvel For Austalia . * applicable to reply paid address structures only. After the recipient’s name, you need to write their house name or number and the street name. How To Address A Letter To A Po Box Australia from nictutor.blogspot.com Use a font or handwriting that is easy to read and clear. Underneath the po box number, write the city, state and zip code. Write the town, state and australia postal code on the same line.