Rolf Keller wrote:
FWIW: A postman, mailman, letter carrier in Japan. Moscow, Athen etc. may or may not be able to read Latin characters and/or understand address forms. That's why I learnt (in Germany, though) that addresses should be written in the form, which the foreign postman expects. Underneath of the address we put the country name in Latin capitals, so that our German post office knows to which target country the letter should be routed.