Determined burglars may use ruses to gain entry into homes that promise of big pay-outs. They may be setting up to steal immediately or to scout the premises for later by pretending to be a utility employee, the cable installer or even a police officer. Homeowners should ask for identification, and then call the company or agency to verify that the visit is official. (Use the number listed on your bill; don't trust a number the visitor provides. Their cousin could be the one answering the phone.)
A common ruse is posing as delivery or moving companies. This is highly effective, since most neighbors will not question a large van in the driveway with uniformed workers carrying contents from the house. Alert stay-at-home neighbors that you'll never have a van at your home unless you've informed them first. The neighbor who spots such a van can call you or the police right away.