So instead, they negotiate with the property owner to have them donate the property in return for forgiveness of the back taxes. This happened with a number of neighborhoods in Philadelphia, when I lived there. After the city took possession of the property, they would then setup a neighborhood group to give or sell the properties to people or businesses that they thought would help "gentrify" the neighborhood. The people requesting properties would fill out an application detailing how they would use the property, and the neighborhood council would select "deserving" applications (I put that in scare quotes because the process would sometimes be corrupted by people favoring friends.) I knew someone on one of these councils, and considered applying for a home, but decided I wasn't that committed to living there, and a year later moved west.