Need a new roof, home security system, kitchen, driveway or furnace? At some point, you will. And when you do, you’ll search out reputable contractors who offer fair pricing—via the classified section of the local paper, an online search, Craigslist, or by making some calls to friends and family who know someone. Each resource provides its own set of pros and cons, and scammers use every resource.
http://robertsiciliano.com/blog/2013/06/05/8-ways-to-avoid-contractor-fraud/