An SR-22 is another form of proof of insurance, but this is specifically assigned to drivers who are considered very high risk, have been involved in a large number of accidents, or have been convicted of driving while under the influence of drugs or alcohol. Sometimes, people who have been caught driving without car insurance are mandated to also have an SR-22 in addition to a new insurance policy. It is not additional insurance for your vehicle, but a form that is filled out by your insurer and then sent to the State Motor Department where it is kept as part of your driving record. It is not to replace a policy, but to be used as an additional way to ensure this driver has insurance now. It is also a type of “tag” with the SR-22 to let anyone who views his record know that s/he has not been 100% compliant with the laws.