In the US there is also a trend for certain companies to use an address "fixer" or "reformater" API to automatically wither check and or fix an entered address.

In the US there is also a trend for certain companies to use an address "fixer" or "reformater" API to automatically wither check and or fix an entered address. So bad. When I moved into a newly built apartment building a few years ago there were more than a few sites that just would not accept that the actual address was real and valid. ick.