To determine the extent of your damage and verify what damage to your car is new, insurance adjusters usually try to obtain accident reports, police notes, photos of the accident, and interviews with other drivers and witnesses to find out the circumstances of the accident. Once the adjuster has checked the vehicle, he will use a computer program to determine the cost of repairing any damage related to an accident. The program will provide an estimate of how much it should cost to repair your car. If there are any problems or questions about damage and repairs, you can consult a mechanic or an expert in car body repair.
An adjuster can determine the age of the damage by seeing if the vehicle has had a history of accidents. When they physically inspect a car, they try to find any evidence of sanding, rust, or paint that doesn't match. The signs could represent old damage and repairs. As part of the claims process, the insurance adjuster will interview the claimant and any witnesses, if any.
They will try to piece together the story to determine who was at fault and determine what damages occurred as a result of the accident and which ones already existed.