In Huber v. Seaton (2nd Dist. 1989), 186 Ill. App. 3d 503, 508, 542 N.E.2d 464, 134 Ill. Dec. 285, cert. denied (1989), the Court reversed a jury's verdict against a landlord whom the plaintiffs alleged negligently hired a plumbing contractor who left a valve open on a propane torch which burned down the plaintiffs' home and destroyed their belongings. (Id. at 505.) The plaintiffs alleged that the plumber's particular unfitness, of which the landlord should have been aware, was that the plumber was not licensed, as state law required, and that the plumber did not have liability insurance. Id. at 506-507.