When a city homes own a property, how can I purchase it?

[Jordan L.]

I am a newbie and I am starting to wholesale. I was riding around and I saw some vacant homes. I jot down their addresses and look them up to see the owner on the county property appraiser website. I did this so I canb send yellow letters. I notice that some of these homes are own by the city. What do I do in cases like this?