Can Auto Insurance Be Backdated? 
You ca n't backdate a new policy , but you can backdate coverage on a new car . If you already have an auto policy and you purchase a new car -LRB- for most policies -RRB- you have coverage , even if your agency is closed . Let 's say you buy the car on Friday night and ca n't call your agent untill Monday morning.He / She adds your car on essentially backdating the policy to Friday . Even if you have an accident over the weekend , you would be covered . Please check with your carrier as not all carriers do this . 