Yes, for that piece of mail, but I wouldnāt assume itās going to work all the time.
More the exception than the rule, I would assume. But the exception went viral five years ago.
Royal Mail (U.K) would never deliver it without a full address or postcode, sometimes post gets to you without a postcode, but you at least need the street name and city, I wonder if a map would work, I so want to try this now! Iāll let you know how I get onā¦ lol
Ed
Yes in germany with my Adress it worked too. Town map and the wheelchair diver with dog and i got the letter one year ago
So here it is, I shall post it to myself, so I donāt mind if I never get it backā¦
As a safety on the back, Iām giving permission to Royal Mail to open, inside is a letter saying why Iāve tried this and my full postal address, letās see if the map works or they have to open it!
Ed
Ed, your experiment reminds me of the original 1840 postcard sent by Theodore Hook, London (1840); thatās one of the reasons I chose @HookedonPostcards for my username. 
Please update us in this chat regarding the outcome of your experiment. Iām quite curious ā¦
Cheers!
I love this experiment. Please keep us updated!
I am curious if it will work. I feel there is a significant difference between a place in a town and a remote farm. It the first case you need a postcode so that the letter gets to the mailman who delivers in your area. At least in CZ. The farms, on the other hand, tend to be pretty remote. So I feel you can theoretically be more vague there because there will probably be only one mail route in that direction 
I may try that as wellā¦
I wonder why the stamp on the envelope was from Iceland, as was the destination, yet it was written in English? Also the stamp bears a postmark which does not appear to extend to the envelope, making it look like a used one which had been glued on . So in answer to the question āIs this true?ā I would say āProbably notā.
Someone visited Iceland on a holiday, and visited this specific farm. Later on their trip, while still on Iceland, they wanted to send a letter to the couple living on the farm.
Hereās an article from BBC about the letter:
Thanks for the link to the BBC report Norwaygirl.
On the subject of unusual posting methods, I once sent my girlfriend a postcard when I was around sixty kilometres off the east coast of Australia. I was on a passenger ship on a run from Sydney to Guam, and sealed the card in a plastic container and threw it overboard. I put in a note, asking the finder to send it, and a souvenir card of the ship as well. It took around nine days to reach her! Someone found it on a beach and sent it on to its destination.
Somewhat related - has anyone ever tried if the three word location grid works instead of a full adress when sending mail?
So romantic!!! 
All sorts of address related shenanigans!
Eight times Irish postmen amazingly delivered mail against all odds | The Irish Post
Thank you for sharing! Delightful! 
So inconceivable! You must familiar with the tides so it can reach the beach not in deep sea haha
Not quite the same but this was delivered by an Irish Postie in County Donegal to its correct recipient.
Iām sure there have been other cases, but as for a map, I think the above may be the first documented in modern times.