Something like that has not worked in Finland for several years. All addresses are scanned and matched by the mail with a DB of "valid addresses". There is a bi

Something like that has not worked in Finland for several years. All addresses are scanned and matched by the mail with a DB of "valid addresses". There is a big student dorm in this city here, which has had problems with mail delivery for years. Not that students would receive a lot of mail. Most businesses charge extra for paper bills, most authorities prefer electronic messages and private postcards don't seem to be common in that age group either. After years of undeliverable mail it was found that the building permit for the dorm was registered incorrectly by the city and as a result the rooms were never registered as residential addresses in the postal DB.