Believing mailing address cities actually corresponds to a unit of government is one thing I learned is incorrect when I moved to the LA area. I live near a pl

Believing mailing address cities actually corresponds to a unit of government is one thing I learned is incorrect when I moved to the LA area. I live near a place called Westlake Village that straddles the LA County/Ventura County line. In LA County, Westlake Village is a city. In Ventura County, Westlake Village is a neighborhood within Thousand Oaks, and it has a different tax rate. But both mailing addresses use Westlake Village as the city. Similarly, I have friends that live in Newbury Park, and that's what is on his mailing address. But Newbury Park is just a neighborhood within Thousand Oaks.