Kansas Attorney General Kris Kobach is urging Kansas residents to use caution to avoid scams by unregistered contractors following recent storms. Working with a roofer that is registered is a bare minimum to help prevent problems. The attorney general’s office also recommends the following tips in dealing with any unregistered contractors, including roofers:Get recommendations and references. Get at least three written estimates from different contractors. Check contractor complaint records with the Better Business Bureau. Understand your payment options and right to cancel.