The only situation I have experienced is when I wanted a refund on previous premiums. For instance, let's say I have auto insurance on three cars. I sold one and didn't tell my insurance company it was sold. My current company would ask when I sold it and refund my over-payment of premiums from that day forward. However, some companies just reduce your premiums from the day you CALL forward. So let's say you make a six-month auto insurance payment on July 1st for 3 cars. One July 2nd you sell car #3 and on July 3rd you call to tell the insurance company that they can stop insuring the extra car. They can't say, "Oops, sorry. You paid to insure three cars. Your premiums will be reduced 6 months from now." They have to refund your money.