<prompt> Human: I am located in the United States New Mexico. In July of 2015, I sold my motorcycle on Craigslist to a guy I knew a little from school. I did not do a bill of sale big mistake and as far as I know the guy did not registrar the motorcycle. I also did not remove the license plate another big mistake. In May of 2016, I get a call from State Farm informing me that I was involved in a hit and run and I owe them 4900. After talking to some friends of friends who knew of him, I learned that he hit a car while riding a motorcycle that was not the one I sold him and that he had put my plate on the motorcycle that was involved in the wreck. I even have a picture of him on the motorcycle with my plate on it. I gave state farm his name and his number and they dropped it. This week I got a letter from a collection agency informing me that I owe them 4900 over this incident. What can I do to get this dropped?In May 2016, I talked to the driver that got hit and the driver said the guy stopped and took off his helmet after the accident and he could verify that I was not the rider.  <response>: Tell them to prove it. 