I had an uncle who was famous in our family for his desire to test various systems. It was only a matter of time before he decided he had to test the postal service.
He picked up a postcard, wrote his initials and his last name and his zip code, and dropped it off at a mail box when he was traveling.
The postcard found it's way to his house in Bangalore, India in the 1990s (if I recall correctly).
As a young man, I spent some time in India. As an experiment one day, I wrote a postcard to my parents back in the UK, addressed in Devanagari script. In the message, I wrote something to the effect that it was intended as a challenge to the British postal service.
It was duly delivered to my parents in rural Sussex, with a pencilled note saying "the challenge has been met".
Delivering to Bangalore might be easier though. In a lot of places in Rural India, house numbers simply do not exist, and addresses are of the form
Mr. ABCD S/O Mr, XYZ, Village <Village_Name>, postal code, city, state
The Village_Name part encompasses a very large area. The good thing is people in rural areas know a lot of people by name, so asking a small number of people for Mr. ABCD S/O Mr, XYZ turns out to be sufficient. But I often wonder how challenging it is to deliver stuff with so much ambiguity.
https://www.worldpress.org/Americas/592.cfm claims “From where the Chinese restaurant used to be, two blocks down, half a block toward the lake, next door to the house where the yellow car is parked, Managua, Nicaragua.” was a valid address at some time, and claims that works, in Nicaragua.
Looking at Apple or Google Maps, it seems at least the major streets do have names (¿nowadays?), though.
He picked up a postcard, wrote his initials and his last name and his zip code, and dropped it off at a mail box when he was traveling.
The postcard found it's way to his house in Bangalore, India in the 1990s (if I recall correctly).