An umbrella insurance policy is extra liability insurance coverage that goes beyond the limits of the insured's home, auto or watercraft insurance. It provides an additional layer of security to those who are at risk for being sued for damages to other people's property or injuries caused to others in an accident. It also protects the policy holder against libel, vandalism, slander and invasion of privacy. An umbrella insurance policy is very helpful when the insurance owner is sued and the dollar limit of the original policy has been exhausted.