Normally, if someone has made a claim against your insurance policy your insurance company will need to inform you so that they get a statement from you regarding the accident. Your side of the accident as well as the person placing the claims description of the accident helps the insurance adjuster determine fault and if the claim will be accepted or denied.

To find out if your state has exact statutes or laws regarding if a policyholder must be informed of a claim made against them and if so how quickly, check with your insurance regulatory body. In the UK try checking with Financial Service Authority.