What's the difference between the city and city area fields? My best guess is that you select region>city and if the place you are living in is not available, you type it in the city area field. Is that right? If so, is there a way to make city or the city area required? I know the city can be set as required, but when a user lives in a place that isn't a city, and want's to provide the city area, he can't simply post the ad. Is there anything that can be done in this case?

City area is on same level as address (example).
It's just text field.

City area is on same level as address (example).
It's just text field.

So if I required the place of living to be entered, and the user lives in some place that isn't listed, he won't be able to pass the step?

Can I ask where the region/city database is created from? Because it lacks lots of entries for Poland.