A Financial Responsibility Insurance Certificate (SR-22) is proof or verification the holder is maintaining vehicle liability insurance in the required amounts. It is not a type of insurance—it is a form filed with the state’s department of public safety (DPS), department of transportation (DOT), or department of motor vehicles (DMV) and may also be referred to as an SR-22 Bond or SR-22 Form.

An SR-22 can be issued by most insurance providers, who will notify the state’s department of public safety or department of motor vehicles when an SR-22 is cancelled, terminated, or lapses.

The state will often require a driver whose license has been suspended following an arrest for DUI/DWI to provide an SR-22 in order to get their occupational or restricted license or to have their driver’s license reinstated.

In Wisconsin, an SR-22 is a certificate of financial responsibility required for certain drivers to prove that they carry the state's required minimum amount of vehicle liability insurance. This certificate is not an insurance policy but a verification filed with the Wisconsin Department of Transportation (WisDOT) that the individual is insured. Insurance companies that issue auto policies in Wisconsin can provide an SR-22 form, and they are obligated to inform WisDOT if the SR-22 is cancelled, terminated, or lapses. Typically, Wisconsin may require drivers to file an SR-22 after serious traffic violations such as a DUI/DWI. The requirement for an SR-22 can be a condition for the reinstatement of a suspended driver's license, or for obtaining an occupational or restricted license, which allows driving under certain conditions when the regular license is suspended or revoked.