What are the chances of actually collecting on a judgment?
This depends upon what type of entity are we dealing with and how old is the judgment. Is it a corporation and if so, is it up and running or defunct. If the latter applies, the chance of collecting is poor. If a successor corporation took over the assets and liability, there are many factors involved as to the success of collection. If it is a sole proprietorship, the individual is liable and may have assets such as a house, car, a W-2 salary, in which case collection may be successful.
