What is the primary purpose of a proof of insurance card?

The primary purpose of a proof of insurance card is to serve as evidence of vehicle insurance. This card is an official document that demonstrates that a vehicle is covered by an auto insurance policy, meeting the legal requirements for liability coverage in many jurisdictions. When law enforcement officials or other entities request proof of insurance, having this card readily available is important to validate that the vehicle owner has the required insurance in place. While other options may contain elements of information regarding the vehicle or insurance, they do not fulfill the primary legal requirement of confirming active insurance coverage as directly as the proof of insurance card does.