A few states impose liability on social hosts, but usually only for injuries on the premises. In other states, people who serve alcohol to drivers who then injure others on the road may be held liable as well. Many states impose liability on commercial sellers of alcohol, including bars and package stores, for injury to others caused by drunken patrons. In some states, a vendor has a duty to withhold liquor to prevent a customer from injuring himself or others. Check the laws of your state to find out what precautions you should take; your state representative, among others, will be able to tell you what local law provides.