To get proof of insurance before buying a car, you essentially need to secure a policy that activates the moment you take ownership. This process differs depending on whether you already have an existing policy or are a first-time buyer. If You Already Have Insurance
Many dealerships accept your existing insurance card as temporary proof, as most policies provide a grace period (usually 7–30 days) for newly purchased vehicles.
Ask your agent for an insurance binder , which is a temporary document proving coverage before the official policy is issued. If You Don’t Have Insurance Yet
Most major insurers allow you to purchase a policy on your phone while at the lot and receive digital proof within minutes. How To Get Proof of Insurance - Progressive
If you have the Vehicle Identification Number (VIN) from the seller or dealer, you can add it to your policy online or via app immediately.