Because open houses do not require interested parties to show identification or sign the guest roster, they offer a perfect opportunity for thieves, most of whom target jewellery, personal electronics, and prescription drugs. Fortunately, today's booming market, with homes selling in a day or two, has allowed many sellers to forego open houses.

When this is not the case, however, sellers should remove all their valuables; check doors and windows after all showings to make sure they have not been unlocked for easy access later on; and refuse to show the home without an appointment or when they are alone.

Finally, owners should make sure their agent doesn't let anyone know when they are on vacation.